diff --git a/composer.lock b/composer.lock
index 69a9dee..2d393c7 100644
--- a/composer.lock
+++ b/composer.lock
@@ -682,16 +682,16 @@
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@@ -1445,12 +1448,12 @@
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@@ -2282,16 +2285,16 @@
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@@ -2328,7 +2331,7 @@
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@@ -2376,16 +2379,16 @@
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-                "zendframework/zend-validator": "Zend\\Validator component"
+                "zendframework/zend-servicemanager": "Zend\\ServiceManager component, for easily extending ExtensionManager implementations",
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@@ -2431,7 +2435,7 @@
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@@ -3835,16 +3839,16 @@
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@@ -3867,7 +3871,10 @@
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@@ -3885,20 +3892,20 @@
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+            "time": "2015-11-02 20:20:53"
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@@ -3913,7 +3920,10 @@
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@@ -3969,7 +3979,10 @@
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diff --git a/vendor/composer/installed.json b/vendor/composer/installed.json
index 75f9dc2..baf2705 100644
--- a/vendor/composer/installed.json
+++ b/vendor/composer/installed.json
@@ -761,131 +761,6 @@
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@@ -2040,90 +1915,105 @@
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+            "psr-0": {
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+            "BSD-3-Clause"
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-                "email": "fabien@symfony.com"
+                "email": "fabien@symfony.com",
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-                "name": "Symfony Community",
-                "homepage": "https://symfony.com/contributors"
+                "name": "Armin Ronacher",
+                "email": "armin.ronacher@active-4.com",
+                "role": "Project Founder"
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+                "homepage": "http://twig.sensiolabs.org/contributors",
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-        "homepage": "https://symfony.com"
+        "description": "Twig, the flexible, fast, and secure template language for PHP",
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+            "type": "git",
+            "url": "https://github.com/zendframework/zend-diactoros.git",
+            "reference": "edfda00b9831630c19c411f85f50a47bb66af457"
+        },
+        "dist": {
+            "type": "zip",
+            "url": "https://api.github.com/repos/zendframework/zend-diactoros/zipball/edfda00b9831630c19c411f85f50a47bb66af457",
+            "reference": "edfda00b9831630c19c411f85f50a47bb66af457",
+            "shasum": ""
+        },
+        "require": {
+            "php": ">=5.4",
+            "psr/http-message": "~1.0"
+        },
+        "provide": {
+            "psr/http-message-implementation": "~1.0.0"
+        },
+        "require-dev": {
+            "phpunit/phpunit": "~4.6",
+            "squizlabs/php_codesniffer": "^2.3.1"
+        },
+        "time": "2015-11-24 19:16:22",
+        "type": "library",
+        "extra": {
+            "branch-alias": {
+                "dev-master": "1.2-dev",
+                "dev-develop": "1.3-dev"
+            }
+        },
+        "installation-source": "dist",
+        "autoload": {
+            "psr-4": {
+                "Zend\\Diactoros\\": "src/"
+            }
+        },
+        "notification-url": "https://packagist.org/downloads/",
+        "license": [
+            "BSD-2-Clause"
+        ],
+        "description": "PSR HTTP Message implementations",
+        "homepage": "https://github.com/zendframework/zend-diactoros",
+        "keywords": [
+            "http",
+            "psr",
+            "psr-7"
+        ]
+    },
+    {
+        "name": "symfony/css-selector",
+        "version": "v2.7.7",
+        "version_normalized": "2.7.7.0",
+        "source": {
+            "type": "git",
+            "url": "https://github.com/symfony/css-selector.git",
+            "reference": "abb47717fb88aebd9437da2fc8bb01a50a36679f"
+        },
+        "dist": {
+            "type": "zip",
+            "url": "https://api.github.com/repos/symfony/css-selector/zipball/abb47717fb88aebd9437da2fc8bb01a50a36679f",
+            "reference": "abb47717fb88aebd9437da2fc8bb01a50a36679f",
+            "shasum": ""
+        },
+        "require": {
+            "php": ">=5.3.9"
+        },
+        "time": "2015-10-30 20:10:21",
+        "type": "library",
+        "extra": {
+            "branch-alias": {
+                "dev-master": "2.7-dev"
+            }
+        },
+        "installation-source": "dist",
+        "autoload": {
+            "psr-4": {
+                "Symfony\\Component\\CssSelector\\": ""
+            },
+            "exclude-from-classmap": [
+                "/Tests/"
+            ]
+        },
+        "notification-url": "https://packagist.org/downloads/",
+        "license": [
+            "MIT"
+        ],
+        "authors": [
+            {
+                "name": "Jean-François Simon",
+                "email": "jeanfrancois.simon@sensiolabs.com"
+            },
+            {
+                "name": "Fabien Potencier",
+                "email": "fabien@symfony.com"
+            },
+            {
+                "name": "Symfony Community",
+                "homepage": "https://symfony.com/contributors"
+            }
+        ],
+        "description": "Symfony CssSelector Component",
+        "homepage": "https://symfony.com"
+    },
+    {
+        "name": "symfony/debug",
+        "version": "v2.7.7",
+        "version_normalized": "2.7.7.0",
+        "source": {
+            "type": "git",
+            "url": "https://github.com/symfony/debug.git",
+            "reference": "0dbc119596f4afc82d9b2eb2a7e6a4af1ee763fa"
+        },
+        "dist": {
+            "type": "zip",
+            "url": "https://api.github.com/repos/symfony/debug/zipball/0dbc119596f4afc82d9b2eb2a7e6a4af1ee763fa",
+            "reference": "0dbc119596f4afc82d9b2eb2a7e6a4af1ee763fa",
+            "shasum": ""
+        },
+        "require": {
+            "php": ">=5.3.9",
+            "psr/log": "~1.0"
+        },
+        "conflict": {
+            "symfony/http-kernel": ">=2.3,<2.3.24|~2.4.0|>=2.5,<2.5.9|>=2.6,<2.6.2"
+        },
+        "require-dev": {
+            "symfony/class-loader": "~2.2",
+            "symfony/http-kernel": "~2.3.24|~2.5.9|~2.6,>=2.6.2"
+        },
+        "time": "2015-10-30 20:10:21",
+        "type": "library",
+        "extra": {
+            "branch-alias": {
+                "dev-master": "2.7-dev"
+            }
+        },
+        "installation-source": "dist",
+        "autoload": {
+            "psr-4": {
+                "Symfony\\Component\\Debug\\": ""
+            },
+            "exclude-from-classmap": [
+                "/Tests/"
+            ]
+        },
+        "notification-url": "https://packagist.org/downloads/",
+        "license": [
+            "MIT"
+        ],
+        "authors": [
+            {
+                "name": "Fabien Potencier",
+                "email": "fabien@symfony.com"
+            },
+            {
+                "name": "Symfony Community",
+                "homepage": "https://symfony.com/contributors"
+            }
+        ],
+        "description": "Symfony Debug Component",
+        "homepage": "https://symfony.com"
+    },
+    {
+        "name": "symfony/dom-crawler",
+        "version": "v2.7.7",
+        "version_normalized": "2.7.7.0",
+        "source": {
+            "type": "git",
+            "url": "https://github.com/symfony/dom-crawler.git",
+            "reference": "b33593cbfe1d81b50d48353f338aca76a08658d8"
+        },
+        "dist": {
+            "type": "zip",
+            "url": "https://api.github.com/repos/symfony/dom-crawler/zipball/b33593cbfe1d81b50d48353f338aca76a08658d8",
+            "reference": "b33593cbfe1d81b50d48353f338aca76a08658d8",
+            "shasum": ""
+        },
+        "require": {
+            "php": ">=5.3.9"
+        },
+        "require-dev": {
+            "symfony/css-selector": "~2.3"
+        },
+        "suggest": {
+            "symfony/css-selector": ""
+        },
+        "time": "2015-11-02 20:20:53",
+        "type": "library",
+        "extra": {
+            "branch-alias": {
+                "dev-master": "2.7-dev"
+            }
+        },
+        "installation-source": "dist",
+        "autoload": {
+            "psr-4": {
+                "Symfony\\Component\\DomCrawler\\": ""
+            },
+            "exclude-from-classmap": [
+                "/Tests/"
+            ]
+        },
+        "notification-url": "https://packagist.org/downloads/",
+        "license": [
+            "MIT"
+        ],
+        "authors": [
+            {
+                "name": "Fabien Potencier",
+                "email": "fabien@symfony.com"
+            },
+            {
+                "name": "Symfony Community",
+                "homepage": "https://symfony.com/contributors"
+            }
+        ],
+        "description": "Symfony DomCrawler Component",
+        "homepage": "https://symfony.com"
+    },
+    {
+        "name": "symfony/browser-kit",
+        "version": "v2.7.7",
+        "version_normalized": "2.7.7.0",
+        "source": {
+            "type": "git",
+            "url": "https://github.com/symfony/browser-kit.git",
+            "reference": "bd28847ea2193916074c7b11d4fdd78570049694"
+        },
+        "dist": {
+            "type": "zip",
+            "url": "https://api.github.com/repos/symfony/browser-kit/zipball/bd28847ea2193916074c7b11d4fdd78570049694",
+            "reference": "bd28847ea2193916074c7b11d4fdd78570049694",
+            "shasum": ""
+        },
+        "require": {
+            "php": ">=5.3.9",
+            "symfony/dom-crawler": "~2.0,>=2.0.5"
+        },
+        "require-dev": {
+            "symfony/css-selector": "~2.0,>=2.0.5",
+            "symfony/process": "~2.3.34|~2.7,>=2.7.6"
+        },
+        "suggest": {
+            "symfony/process": ""
+        },
+        "time": "2015-11-02 20:20:53",
+        "type": "library",
+        "extra": {
+            "branch-alias": {
+                "dev-master": "2.7-dev"
+            }
+        },
+        "installation-source": "dist",
+        "autoload": {
+            "psr-4": {
+                "Symfony\\Component\\BrowserKit\\": ""
+            },
+            "exclude-from-classmap": [
+                "/Tests/"
+            ]
+        },
+        "notification-url": "https://packagist.org/downloads/",
+        "license": [
+            "MIT"
+        ],
+        "authors": [
+            {
+                "name": "Fabien Potencier",
+                "email": "fabien@symfony.com"
+            },
+            {
+                "name": "Symfony Community",
+                "homepage": "https://symfony.com/contributors"
+            }
+        ],
+        "description": "Symfony BrowserKit Component",
+        "homepage": "https://symfony.com"
+    },
+    {
+        "name": "symfony/http-foundation",
+        "version": "2.8.x-dev",
+        "version_normalized": "2.8.9999999.9999999-dev",
+        "source": {
+            "type": "git",
+            "url": "https://github.com/symfony/http-foundation.git",
+            "reference": "5ed0ec39ef684bec84d1fd9f2a55104e403b7e49"
+        },
+        "dist": {
+            "type": "zip",
+            "url": "https://api.github.com/repos/symfony/http-foundation/zipball/5ed0ec39ef684bec84d1fd9f2a55104e403b7e49",
+            "reference": "5ed0ec39ef684bec84d1fd9f2a55104e403b7e49",
+            "shasum": ""
+        },
+        "require": {
+            "php": ">=5.3.9",
+            "symfony/polyfill-php54": "~1.0"
+        },
+        "require-dev": {
+            "symfony/expression-language": "~2.4|~3.0.0"
+        },
+        "time": "2015-11-27 11:03:19",
+        "type": "library",
+        "extra": {
+            "branch-alias": {
+                "dev-master": "2.8-dev"
+            }
+        },
+        "installation-source": "dist",
+        "autoload": {
+            "psr-4": {
+                "Symfony\\Component\\HttpFoundation\\": ""
+            },
+            "exclude-from-classmap": [
+                "/Tests/"
+            ]
+        },
+        "notification-url": "https://packagist.org/downloads/",
+        "license": [
+            "MIT"
+        ],
+        "authors": [
+            {
+                "name": "Fabien Potencier",
+                "email": "fabien@symfony.com"
+            },
+            {
+                "name": "Symfony Community",
+                "homepage": "https://symfony.com/contributors"
+            }
+        ],
+        "description": "Symfony HttpFoundation Component",
+        "homepage": "https://symfony.com"
     }
 ]
diff --git a/vendor/guzzlehttp/guzzle/.travis.yml b/vendor/guzzlehttp/guzzle/.travis.yml
index c0689d1..d2060f4 100644
--- a/vendor/guzzlehttp/guzzle/.travis.yml
+++ b/vendor/guzzlehttp/guzzle/.travis.yml
@@ -1,5 +1,7 @@
 language: php
 
+sudo: false
+
 php:
   - 5.5
   - 5.6
diff --git a/vendor/guzzlehttp/guzzle/CHANGELOG.md b/vendor/guzzlehttp/guzzle/CHANGELOG.md
index de7da2d..5b7669b 100644
--- a/vendor/guzzlehttp/guzzle/CHANGELOG.md
+++ b/vendor/guzzlehttp/guzzle/CHANGELOG.md
@@ -1,5 +1,20 @@
 # CHANGELOG
 
+## 6.1.1 - 2015-11-22
+
+* Bug fix: Proxy::wrapSync() now correctly proxies to the appropriate handler
+  https://github.com/guzzle/guzzle/commit/911bcbc8b434adce64e223a6d1d14e9a8f63e4e4
+* Feature: HandlerStack is now more generic.
+  https://github.com/guzzle/guzzle/commit/f2102941331cda544745eedd97fc8fd46e1ee33e
+* Bug fix: setting verify to false in the StreamHandler now disables peer
+  verification. https://github.com/guzzle/guzzle/issues/1256
+* Feature: Middleware now uses an exception factory, including more error
+  context. https://github.com/guzzle/guzzle/pull/1282
+* Feature: better support for disabled functions.
+  https://github.com/guzzle/guzzle/pull/1287
+* Bug fix: fixed regression where MockHandler was not using `sink`.
+  https://github.com/guzzle/guzzle/pull/1292
+
 ## 6.1.0 - 2015-09-08
 
 * Feature: Added the `on_stats` request option to provide access to transfer
diff --git a/vendor/guzzlehttp/guzzle/README.md b/vendor/guzzlehttp/guzzle/README.md
index 2d721c0..3af1cc3 100644
--- a/vendor/guzzlehttp/guzzle/README.md
+++ b/vendor/guzzlehttp/guzzle/README.md
@@ -23,7 +23,7 @@ $res = $client->request('GET', 'https://api.github.com/user', [
     'auth' => ['user', 'pass']
 ]);
 echo $res->getStatusCode();
-// "200"
+// 200
 echo $res->getHeader('content-type');
 // 'application/json; charset=utf8'
 echo $res->getBody();
diff --git a/vendor/guzzlehttp/guzzle/src/ClientInterface.php b/vendor/guzzlehttp/guzzle/src/ClientInterface.php
index b5b2306..19068e1 100644
--- a/vendor/guzzlehttp/guzzle/src/ClientInterface.php
+++ b/vendor/guzzlehttp/guzzle/src/ClientInterface.php
@@ -12,7 +12,7 @@
  */
 interface ClientInterface
 {
-    const VERSION = '6.1.0';
+    const VERSION = '6.1.1';
 
     /**
      * Send an HTTP request.
diff --git a/vendor/guzzlehttp/guzzle/src/Cookie/CookieJar.php b/vendor/guzzlehttp/guzzle/src/Cookie/CookieJar.php
index ea60068..11421fe 100644
--- a/vendor/guzzlehttp/guzzle/src/Cookie/CookieJar.php
+++ b/vendor/guzzlehttp/guzzle/src/Cookie/CookieJar.php
@@ -82,7 +82,7 @@ public static function getCookieValue($value)
      * that survives between requests.
      *
      * @param SetCookie $cookie Being evaluated.
-     * @param bool $allowSessionCookies If we should presist session cookies
+     * @param bool $allowSessionCookies If we should persist session cookies
      * @return bool
      */
     public static function shouldPersist(
diff --git a/vendor/guzzlehttp/guzzle/src/Cookie/FileCookieJar.php b/vendor/guzzlehttp/guzzle/src/Cookie/FileCookieJar.php
index c55bb34..e4e6248 100644
--- a/vendor/guzzlehttp/guzzle/src/Cookie/FileCookieJar.php
+++ b/vendor/guzzlehttp/guzzle/src/Cookie/FileCookieJar.php
@@ -9,7 +9,7 @@ class FileCookieJar extends CookieJar
     /** @var string filename */
     private $filename;
 
-    /** @var bool Control whether to presist session cookies or not. */
+    /** @var bool Control whether to persist session cookies or not. */
     private $storeSessionCookies;
     
     /**
diff --git a/vendor/guzzlehttp/guzzle/src/Cookie/SessionCookieJar.php b/vendor/guzzlehttp/guzzle/src/Cookie/SessionCookieJar.php
index d80c480..9cd5f9e 100644
--- a/vendor/guzzlehttp/guzzle/src/Cookie/SessionCookieJar.php
+++ b/vendor/guzzlehttp/guzzle/src/Cookie/SessionCookieJar.php
@@ -9,7 +9,7 @@ class SessionCookieJar extends CookieJar
     /** @var string session key */
     private $sessionKey;
     
-    /** @var bool Control whether to presist session cookies or not. */
+    /** @var bool Control whether to persist session cookies or not. */
     private $storeSessionCookies;
 
     /**
diff --git a/vendor/guzzlehttp/guzzle/src/Exception/RequestException.php b/vendor/guzzlehttp/guzzle/src/Exception/RequestException.php
index 23dd02c..56b1831 100644
--- a/vendor/guzzlehttp/guzzle/src/Exception/RequestException.php
+++ b/vendor/guzzlehttp/guzzle/src/Exception/RequestException.php
@@ -79,25 +79,69 @@ public static function create(
 
         $level = floor($response->getStatusCode() / 100);
         if ($level == '4') {
-            $label = 'Client error response';
+            $label = 'Client error';
             $className = __NAMESPACE__ . '\\ClientException';
         } elseif ($level == '5') {
-            $label = 'Server error response';
+            $label = 'Server error';
             $className = __NAMESPACE__ . '\\ServerException';
         } else {
-            $label = 'Unsuccessful response';
+            $label = 'Unsuccessful request';
             $className = __CLASS__;
         }
 
-        $message = $label . ' [url] ' . $request->getUri()
-            . ' [http method] ' . $request->getMethod()
-            . ' [status code] ' . $response->getStatusCode()
-            . ' [reason phrase] ' . $response->getReasonPhrase();
+        // Server Error: `GET /` resulted in a `404 Not Found` response:
+        // <html> ... (truncated)
+        $message = sprintf(
+            '%s: `%s` resulted in a `%s` response',
+            $label,
+            $request->getMethod() . ' ' . $request->getUri(),
+            $response->getStatusCode() . ' ' . $response->getReasonPhrase()
+        );
+
+        $summary = static::getResponseBodySummary($response);
+
+        if ($summary !== null) {
+            $message .= ":\n{$summary}\n";
+        }
 
         return new $className($message, $request, $response, $previous, $ctx);
     }
 
     /**
+     * Get a short summary of the response
+     *
+     * Will return `null` if the response is not printable.
+     *
+     * @param ResponseInterface $response
+     *
+     * @return string|null
+     */
+    public static function getResponseBodySummary(ResponseInterface $response)
+    {
+        $body = $response->getBody();
+
+        if (!$body->isSeekable()) {
+            return null;
+        }
+
+        $size = $body->getSize();
+        $summary = $body->read(120);
+        $body->rewind();
+
+        if ($size > 120) {
+            $summary .= ' (truncated...)';
+        }
+
+        // Matches any printable character, including unicode characters:
+        // letters, marks, numbers, punctuation, spacing, and separators.
+        if (preg_match('/[^\pL\pM\pN\pP\pS\pZ\n\r\t]/', $summary)) {
+            return null;
+        }
+
+        return $summary;
+    }
+
+    /**
      * Get the request that caused the exception
      *
      * @return RequestInterface
diff --git a/vendor/guzzlehttp/guzzle/src/Handler/MockHandler.php b/vendor/guzzlehttp/guzzle/src/Handler/MockHandler.php
index 4b1b0af..cd7898f 100644
--- a/vendor/guzzlehttp/guzzle/src/Handler/MockHandler.php
+++ b/vendor/guzzlehttp/guzzle/src/Handler/MockHandler.php
@@ -87,6 +87,19 @@ function ($value) use ($request, $options) {
                 if ($this->onFulfilled) {
                     call_user_func($this->onFulfilled, $value);
                 }
+                if (isset($options['sink'])) {
+                    $contents = (string) $value->getBody();
+                    $sink = $options['sink'];
+
+                    if (is_resource($sink)) {
+                        fwrite($sink, $contents);
+                    } elseif (is_string($sink)) {
+                        file_put_contents($sink, $contents);
+                    } elseif ($sink instanceof \Psr\Http\Message\StreamInterface) {
+                        $sink->write($contents);
+                    }
+                }
+
                 return $value;
             },
             function ($reason) use ($request, $options) {
diff --git a/vendor/guzzlehttp/guzzle/src/Handler/Proxy.php b/vendor/guzzlehttp/guzzle/src/Handler/Proxy.php
index 9bd76d2..f8b00be 100644
--- a/vendor/guzzlehttp/guzzle/src/Handler/Proxy.php
+++ b/vendor/guzzlehttp/guzzle/src/Handler/Proxy.php
@@ -1,6 +1,7 @@
 <?php
 namespace GuzzleHttp\Handler;
 
+use GuzzleHttp\RequestOptions;
 use Psr\Http\Message\RequestInterface;
 
 /**
@@ -22,7 +23,7 @@ public static function wrapSync(
         callable $sync
     ) {
         return function (RequestInterface $request, array $options) use ($default, $sync) {
-            return empty($options['sync'])
+            return empty($options[RequestOptions::SYNCHRONOUS])
                 ? $default($request, $options)
                 : $sync($request, $options);
         };
diff --git a/vendor/guzzlehttp/guzzle/src/Handler/StreamHandler.php b/vendor/guzzlehttp/guzzle/src/Handler/StreamHandler.php
index 2f18a48..c835dc7 100644
--- a/vendor/guzzlehttp/guzzle/src/Handler/StreamHandler.php
+++ b/vendor/guzzlehttp/guzzle/src/Handler/StreamHandler.php
@@ -359,12 +359,14 @@ private function add_verify(RequestInterface $request, &$options, $value, &$para
             }
         } elseif ($value === false) {
             $options['ssl']['verify_peer'] = false;
+            $options['ssl']['verify_peer_name'] = false;
             return;
         } else {
             throw new \InvalidArgumentException('Invalid verify request option');
         }
 
         $options['ssl']['verify_peer'] = true;
+        $options['ssl']['verify_peer_name'] = true;
         $options['ssl']['allow_self_signed'] = false;
     }
 
diff --git a/vendor/guzzlehttp/guzzle/src/HandlerStack.php b/vendor/guzzlehttp/guzzle/src/HandlerStack.php
index f851849..a72e38a 100644
--- a/vendor/guzzlehttp/guzzle/src/HandlerStack.php
+++ b/vendor/guzzlehttp/guzzle/src/HandlerStack.php
@@ -62,11 +62,8 @@ public function __construct(callable $handler = null)
      */
     public function __invoke(RequestInterface $request, array $options)
     {
-        if (!$this->cached) {
-            $this->cached = $this->resolve();
-        }
+        $handler = $this->resolve();
 
-        $handler = $this->cached;
         return $handler($request, $options);
     }
 
@@ -193,15 +190,19 @@ function ($tuple) use ($idx, $remove) {
      */
     public function resolve()
     {
-        if (!($prev = $this->handler)) {
-            throw new \LogicException('No handler has been specified');
-        }
+        if (!$this->cached) {
+            if (!($prev = $this->handler)) {
+                throw new \LogicException('No handler has been specified');
+            }
+
+            foreach (array_reverse($this->stack) as $fn) {
+                $prev = $fn[0]($prev);
+            }
 
-        foreach (array_reverse($this->stack) as $fn) {
-            $prev = $fn[0]($prev);
+            $this->cached = $prev;
         }
 
-        return $prev;
+        return $this->cached;
     }
 
     /**
diff --git a/vendor/guzzlehttp/guzzle/src/Middleware.php b/vendor/guzzlehttp/guzzle/src/Middleware.php
index 2f165f3..85d3165 100644
--- a/vendor/guzzlehttp/guzzle/src/Middleware.php
+++ b/vendor/guzzlehttp/guzzle/src/Middleware.php
@@ -2,9 +2,7 @@
 namespace GuzzleHttp;
 
 use GuzzleHttp\Cookie\CookieJarInterface;
-use GuzzleHttp\Exception\ClientException;
 use GuzzleHttp\Exception\RequestException;
-use GuzzleHttp\Exception\ServerException;
 use GuzzleHttp\Promise\RejectedPromise;
 use GuzzleHttp\Psr7;
 use Psr\Http\Message\ResponseInterface;
@@ -64,9 +62,7 @@ function (ResponseInterface $response) use ($request, $handler) {
                         if ($code < 400) {
                             return $response;
                         }
-                        throw $code > 499
-                            ? new ServerException("Server error: $code", $request, $response)
-                            : new ClientException("Client error: $code", $request, $response);
+                        throw RequestException::create($request, $response);
                     }
                 );
             };
diff --git a/vendor/guzzlehttp/guzzle/src/Pool.php b/vendor/guzzlehttp/guzzle/src/Pool.php
index bc41d6e..8f1be33 100644
--- a/vendor/guzzlehttp/guzzle/src/Pool.php
+++ b/vendor/guzzlehttp/guzzle/src/Pool.php
@@ -52,11 +52,11 @@ public function __construct(
 
         $iterable = \GuzzleHttp\Promise\iter_for($requests);
         $requests = function () use ($iterable, $client, $opts) {
-            foreach ($iterable as $rfn) {
+            foreach ($iterable as $key => $rfn) {
                 if ($rfn instanceof RequestInterface) {
-                    yield $client->sendAsync($rfn, $opts);
+                    yield $key => $client->sendAsync($rfn, $opts);
                 } elseif (is_callable($rfn)) {
-                    yield $rfn($opts);
+                    yield $key => $rfn($opts);
                 } else {
                     throw new \InvalidArgumentException('Each value yielded by '
                         . 'the iterator must be a Psr7\Http\Message\RequestInterface '
diff --git a/vendor/guzzlehttp/guzzle/src/functions.php b/vendor/guzzlehttp/guzzle/src/functions.php
index d0a2ca8..5e93b22 100644
--- a/vendor/guzzlehttp/guzzle/src/functions.php
+++ b/vendor/guzzlehttp/guzzle/src/functions.php
@@ -104,8 +104,12 @@ function debug_resource($value = null)
 function choose_handler()
 {
     $handler = null;
-    if (extension_loaded('curl')) {
+    if (function_exists('curl_multi_exec') && function_exists('curl_exec')) {
         $handler = Proxy::wrapSync(new CurlMultiHandler(), new CurlHandler());
+    } elseif (function_exists('curl_exec')) {
+        $handler = new CurlHandler();
+    } elseif (function_exists('curl_multi_exec')) {
+        $handler = new CurlMultiHandler();
     }
 
     if (ini_get('allow_url_fopen')) {
diff --git a/vendor/symfony/browser-kit/composer.json b/vendor/symfony/browser-kit/composer.json
index 2313c73..7c0234e 100644
--- a/vendor/symfony/browser-kit/composer.json
+++ b/vendor/symfony/browser-kit/composer.json
@@ -27,7 +27,10 @@
         "symfony/process": ""
     },
     "autoload": {
-        "psr-4": { "Symfony\\Component\\BrowserKit\\": "" }
+        "psr-4": { "Symfony\\Component\\BrowserKit\\": "" },
+        "exclude-from-classmap": [
+            "/Tests/"
+        ]
     },
     "minimum-stability": "dev",
     "extra": {
diff --git a/vendor/symfony/css-selector/composer.json b/vendor/symfony/css-selector/composer.json
index 99eb4da..8836257 100644
--- a/vendor/symfony/css-selector/composer.json
+++ b/vendor/symfony/css-selector/composer.json
@@ -23,7 +23,10 @@
         "php": ">=5.3.9"
     },
     "autoload": {
-        "psr-4": { "Symfony\\Component\\CssSelector\\": "" }
+        "psr-4": { "Symfony\\Component\\CssSelector\\": "" },
+        "exclude-from-classmap": [
+            "/Tests/"
+        ]
     },
     "minimum-stability": "dev",
     "extra": {
diff --git a/vendor/symfony/debug/composer.json b/vendor/symfony/debug/composer.json
index c1b128a..51b0df6 100644
--- a/vendor/symfony/debug/composer.json
+++ b/vendor/symfony/debug/composer.json
@@ -27,7 +27,10 @@
         "symfony/http-kernel": "~2.3.24|~2.5.9|~2.6,>=2.6.2"
     },
     "autoload": {
-        "psr-4": { "Symfony\\Component\\Debug\\": "" }
+        "psr-4": { "Symfony\\Component\\Debug\\": "" },
+        "exclude-from-classmap": [
+            "/Tests/"
+        ]
     },
     "minimum-stability": "dev",
     "extra": {
diff --git a/vendor/symfony/dom-crawler/composer.json b/vendor/symfony/dom-crawler/composer.json
index f8033c5..5ea57b2 100644
--- a/vendor/symfony/dom-crawler/composer.json
+++ b/vendor/symfony/dom-crawler/composer.json
@@ -25,7 +25,10 @@
         "symfony/css-selector": ""
     },
     "autoload": {
-        "psr-4": { "Symfony\\Component\\DomCrawler\\": "" }
+        "psr-4": { "Symfony\\Component\\DomCrawler\\": "" },
+        "exclude-from-classmap": [
+            "/Tests/"
+        ]
     },
     "minimum-stability": "dev",
     "extra": {
diff --git a/vendor/symfony/http-foundation/ParameterBag.php b/vendor/symfony/http-foundation/ParameterBag.php
index 35b4869..4560322 100644
--- a/vendor/symfony/http-foundation/ParameterBag.php
+++ b/vendor/symfony/http-foundation/ParameterBag.php
@@ -90,7 +90,7 @@ public function add(array $parameters = array())
      */
     public function get($key, $default = null, $deep = false)
     {
-        if (true === $deep) {
+        if ($deep) {
             @trigger_error('Using paths to find deeper items in '.__METHOD__.' is deprecated since version 2.8 and will be removed in 3.0. Filter the returned value in your own code instead.', E_USER_DEPRECATED);
         }
 
@@ -214,7 +214,7 @@ public function getAlnum($key, $default = '', $deep = false)
     public function getDigits($key, $default = '', $deep = false)
     {
         // we need to remove - and + because they're allowed in the filter
-        return str_replace(array('-', '+'), '', $this->filter($key, $default, $deep, FILTER_SANITIZE_NUMBER_INT));
+        return str_replace(array('-', '+'), '', $this->filter($key, $default, FILTER_SANITIZE_NUMBER_INT, array(), $deep));
     }
 
     /**
@@ -242,7 +242,7 @@ public function getInt($key, $default = 0, $deep = false)
      */
     public function getBoolean($key, $default = false, $deep = false)
     {
-        return $this->filter($key, $default, $deep, FILTER_VALIDATE_BOOLEAN);
+        return $this->filter($key, $default, FILTER_VALIDATE_BOOLEAN, array(), $deep);
     }
 
     /**
@@ -250,16 +250,31 @@ public function getBoolean($key, $default = false, $deep = false)
      *
      * @param string $key     Key.
      * @param mixed  $default Default = null.
-     * @param bool   $deep    Default = false.
      * @param int    $filter  FILTER_* constant.
      * @param mixed  $options Filter options.
+     * @param bool   $deep    Default = false.
      *
      * @see http://php.net/manual/en/function.filter-var.php
      *
      * @return mixed
      */
-    public function filter($key, $default = null, $deep = false, $filter = FILTER_DEFAULT, $options = array())
+    public function filter($key, $default = null, $filter = FILTER_DEFAULT, $options = array(), $deep = false)
     {
+        static $filters = null;
+
+        if (null === $filters) {
+            foreach (filter_list() as $tmp) {
+                $filters[filter_id($tmp)] = 1;
+            }
+        }
+        if (is_bool($filter) || !isset($filters[$filter]) || is_array($deep)) {
+            @trigger_error('Passing the $deep boolean as 3rd argument to the '.__METHOD__.' method is deprecated since version 2.8 and will be removed in 3.0. Remove it altogether as the $deep argument will be removed in 3.0.', E_USER_ERROR);
+            $tmp = $deep;
+            $deep = $filter;
+            $filter = $options;
+            $options = $tmp;
+        }
+
         $value = $this->get($key, $default, $deep);
 
         // Always turn $options into an array - this allows filter_var option shortcuts.
diff --git a/vendor/symfony/http-foundation/Request.php b/vendor/symfony/http-foundation/Request.php
index edc77df..de36953 100644
--- a/vendor/symfony/http-foundation/Request.php
+++ b/vendor/symfony/http-foundation/Request.php
@@ -724,7 +724,7 @@ public static function getHttpMethodParameterOverride()
      */
     public function get($key, $default = null, $deep = false)
     {
-        if (true === $deep) {
+        if ($deep) {
             @trigger_error('Using paths to find deeper items in '.__METHOD__.' is deprecated since version 2.8 and will be removed in 3.0. Filter the returned value in your own code instead.', E_USER_DEPRECATED);
         }
 
diff --git a/vendor/symfony/http-foundation/Response.php b/vendor/symfony/http-foundation/Response.php
index 96d5055..c88fb6c 100644
--- a/vendor/symfony/http-foundation/Response.php
+++ b/vendor/symfony/http-foundation/Response.php
@@ -329,9 +329,6 @@ public function sendHeaders()
             $this->setDate(\DateTime::createFromFormat('U', time()));
         }
 
-        // status
-        header(sprintf('HTTP/%s %s %s', $this->version, $this->statusCode, $this->statusText), true, $this->statusCode);
-
         // headers
         foreach ($this->headers->allPreserveCase() as $name => $values) {
             foreach ($values as $value) {
@@ -339,6 +336,9 @@ public function sendHeaders()
             }
         }
 
+        // status
+        header(sprintf('HTTP/%s %s %s', $this->version, $this->statusCode, $this->statusText), true, $this->statusCode);
+
         // cookies
         foreach ($this->headers->getCookies() as $cookie) {
             setcookie($cookie->getName(), $cookie->getValue(), $cookie->getExpiresTime(), $cookie->getPath(), $cookie->getDomain(), $cookie->isSecure(), $cookie->isHttpOnly());
@@ -455,7 +455,7 @@ public function setStatusCode($code, $text = null)
         }
 
         if (null === $text) {
-            $this->statusText = isset(self::$statusTexts[$code]) ? self::$statusTexts[$code] : '';
+            $this->statusText = isset(self::$statusTexts[$code]) ? self::$statusTexts[$code] : 'unknown status';
 
             return $this;
         }
diff --git a/vendor/zendframework/zend-diactoros/CHANGELOG.md b/vendor/zendframework/zend-diactoros/CHANGELOG.md
index e6b35b9..aca2ab8 100644
--- a/vendor/zendframework/zend-diactoros/CHANGELOG.md
+++ b/vendor/zendframework/zend-diactoros/CHANGELOG.md
@@ -2,6 +2,38 @@
 
 All notable changes to this project will be documented in this file, in reverse chronological order by release.
 
+## 1.2.0 - 2015-11-24
+
+### Added
+
+- [#88](https://github.com/zendframework/zend-diactoros/pull/88) updates the
+  `SapiEmitter` to emit a `Content-Length` header with the content length as
+  reported by the response body stream, assuming that
+  `StreamInterface::getSize()` returns an integer.
+- [#77](https://github.com/zendframework/zend-diactoros/pull/77) adds a new
+  response type, `Zend\Diactoros\Response\TextResponse`, for returning plain
+  text responses. By default, it sets the content type to `text/plain;
+  charset=utf-8`; per the other response types, the signature is `new
+  TextResponse($text, $status = 200, array $headers = []`.
+- [#90](https://github.com/zendframework/zend-diactoros/pull/90) adds a new
+  `Zend\Diactoros\CallbackStream`, allowing you to back a stream with a PHP
+  callable (such as a generator) to generate the message content. Its
+  constructor accepts the callable: `$stream = new CallbackStream($callable);`
+
+### Deprecated
+
+- Nothing.
+
+### Removed
+
+- Nothing.
+
+### Fixed
+
+- [#77](https://github.com/zendframework/zend-diactoros/pull/77) updates the
+  `HtmlResponse` to set the charset to utf-8 by default (if no content type
+  header is provided at instantiation).
+
 ## 1.1.4 - 2015-10-16
 
 ### Added
@@ -31,7 +63,8 @@ All notable changes to this project will be documented in this file, in reverse
 
 ### Added
 
-- Nothing.
+- [#73](https://github.com/zendframework/zend-diactoros/pull/73) adds caching of
+  the vendor directory to the Travis-CI configuration, to speed up builds.
 
 ### Deprecated
 
diff --git a/vendor/zendframework/zend-diactoros/composer.json b/vendor/zendframework/zend-diactoros/composer.json
index fee75d9..3e59a48 100644
--- a/vendor/zendframework/zend-diactoros/composer.json
+++ b/vendor/zendframework/zend-diactoros/composer.json
@@ -15,8 +15,8 @@
   },
   "extra": {
     "branch-alias": {
-      "dev-master": "1.0-dev",
-      "dev-develop": "1.1-dev"
+      "dev-master": "1.2-dev",
+      "dev-develop": "1.3-dev"
     }
   },
   "require": {
diff --git a/vendor/zendframework/zend-diactoros/src/Response/HtmlResponse.php b/vendor/zendframework/zend-diactoros/src/Response/HtmlResponse.php
index d298ee0..3342609 100644
--- a/vendor/zendframework/zend-diactoros/src/Response/HtmlResponse.php
+++ b/vendor/zendframework/zend-diactoros/src/Response/HtmlResponse.php
@@ -41,7 +41,7 @@ public function __construct($html, $status = 200, array $headers = [])
         parent::__construct(
             $this->createBody($html),
             $status,
-            $this->injectContentType('text/html', $headers)
+            $this->injectContentType('text/html; charset=utf-8', $headers)
         );
     }
 
diff --git a/vendor/zendframework/zend-diactoros/src/Response/SapiEmitter.php b/vendor/zendframework/zend-diactoros/src/Response/SapiEmitter.php
index bba291e..c59257b 100644
--- a/vendor/zendframework/zend-diactoros/src/Response/SapiEmitter.php
+++ b/vendor/zendframework/zend-diactoros/src/Response/SapiEmitter.php
@@ -29,6 +29,14 @@ public function emit(ResponseInterface $response, $maxBufferLevel = null)
             throw new RuntimeException('Unable to emit response; headers already sent');
         }
 
+        if (! $response->hasHeader('Content-Length')) {
+            // PSR-7 indicates int OR null for the stream size; for null values,
+            // we will not auto-inject the Content-Length.
+            if (null !== $response->getBody()->getSize()) {
+                $response = $response->withHeader('Content-Length', (string) $response->getBody()->getSize());
+            }
+        }
+
         $this->emitStatusLine($response);
         $this->emitHeaders($response);
         $this->emitBody($response, $maxBufferLevel);
diff --git a/vendor/zendframework/zend-feed/CHANGELOG.md b/vendor/zendframework/zend-feed/CHANGELOG.md
index 426cab5..850a7b1 100644
--- a/vendor/zendframework/zend-feed/CHANGELOG.md
+++ b/vendor/zendframework/zend-feed/CHANGELOG.md
@@ -2,11 +2,42 @@
 
 All notable changes to this project will be documented in this file, in reverse chronological order by release.
 
-## 2.5.2 - TBD
+## 2.6.0 - 2015-11-24
 
 ### Added
 
-- Nothing.
+- [#13](https://github.com/zendframework/zend-feed/pull/13) introduces
+  `Zend\Feed\Writer\StandaloneExtensionManager`, an implementation of
+  `Zend\Feed\Writer\ExtensionManagerInterface` that has no dependencies.
+  `Zend\Feed\Writer\ExtensionManager` now composes this by default, instead of
+  `Zend\Feed\Writer\ExtensionPluginManager`, for managing the various feed and
+  entry extensions. If you relied on `ExtensionPluginManager` previously, you
+  will need to create an instance manually and inject it into the `Writer`
+  instance.
+- [#14](https://github.com/zendframework/zend-feed/pull/14) introduces:
+  - `Zend\Feed\Reader\Http\HeaderAwareClientInterface`, which extends
+    `ClientInterface` and adds an optional argument to the `get()` method,
+    `array $headers = []`; this argument allows specifying request headers for
+    the client to send. `$headers` should have header names for keys, and the
+    values should be arrays of strings/numbers representing the header values
+    (if only a single value is necessary, it should be represented as an single
+    value array).
+  - `Zend\Feed\Reader\Http\HeaderAwareResponseInterface`, which extends
+    `ResponseInterface` and adds the method `getHeader($name, $default = null)`.
+    Clients may return either a `ResponseInterface` or
+    `HeaderAwareResponseInterface` instance.
+  - `Zend\Feed\Reader\Http\Response`, which is an implementation of
+    `HeaderAwareResponseInterface`. Its constructor accepts the status code,
+    body, and, optionally, headers.
+  - `Zend\Feed\Reader\Http\Psr7ResponseDecorator`, which is an implementation of
+    `HeaderAwareResponseInterface`. Its constructor accepts a PSR-7 response
+    instance, and the various methdos then proxy to those methods. This should
+    make creating wrappers for PSR-7 HTTP clients trivial.
+  - `Zend\Feed\Reader\Http\ZendHttpClientDecorator`, which decorates a
+    `Zend\Http\Client` instance, implements `HeaderAwareClientInterface`, and
+    returns a `Response` instance seeded from the zend-http response upon
+    calling `get()`. The class exposes a `getDecoratedClient()` method to allow
+    retrieval of the decorated zend-http client instance.
 
 ### Deprecated
 
@@ -23,3 +54,19 @@ All notable changes to this project will be documented in this file, in reverse
 - [#2](https://github.com/zendframework/zend-feed/pull/2) ensures that the
   routine for "absolutising" a link in `Reader\FeedSet` always generates a URI
   with a scheme.
+- [#14](https://github.com/zendframework/zend-feed/pull/14) makes the following
+  changes to fix behavior around HTTP clients used within
+  `Zend\Feed\Reader\Reader`:
+  - `setHttpClient()` now ensures that the passed client is either a
+    `Zend\Feed\Reader\Http\ClientInterface` or `Zend\Http\Client`, raising an
+    `InvalidArgumentException` if neither. If a `Zend\Http\Client` is passed, it
+    is passed to the constructor of `Zend\Feed\Reader\Http\ZendHttpClientDecorator`,
+    and the decorator instance is used.
+  - `getHttpClient()` now *always* returns a `Zend\Feed\Reader\Http\ClientInterface`
+    instance. If no instance is currently registered, it lazy loads a
+    `ZendHttpClientDecorator` instance.
+  - `import()` was updated to consume a `ClientInterface` instance; when caches
+    are in play, it checks the client against `HeaderAwareClientInterface` to
+    determine if it can check for HTTP caching headers, and, if so, to retrieve
+    them.
+  - `findFeedLinks()` was updated to consume a `ClientInterface`.
diff --git a/vendor/zendframework/zend-feed/composer.json b/vendor/zendframework/zend-feed/composer.json
index 2c29f06..2daa130 100644
--- a/vendor/zendframework/zend-feed/composer.json
+++ b/vendor/zendframework/zend-feed/composer.json
@@ -21,24 +21,25 @@
         "zendframework/zend-db": "~2.5",
         "zendframework/zend-cache": "~2.5",
         "zendframework/zend-http": "~2.5",
-        "zendframework/zend-servicemanager": "~2.5",
         "zendframework/zend-validator": "~2.5",
         "fabpot/php-cs-fixer": "1.7.*",
-        "phpunit/PHPUnit": "~4.0"
+        "phpunit/PHPUnit": "~4.0",
+        "psr/http-message": "^1.0"
     },
     "suggest": {
-        "zendframework/zend-cache": "Zend\\Cache component",
-        "zendframework/zend-db": "Zend\\Db component",
+        "psr/http-message": "PSR-7 ^1.0, if you wish to use Zend\\Feed\\Reader\\Http\\Psr7ResponseDecorator",
+        "zendframework/zend-cache": "Zend\\Cache component, for optionally caching feeds between requests",
+        "zendframework/zend-db": "Zend\\Db component, for use with PubSubHubbub",
         "zendframework/zend-http": "Zend\\Http for PubSubHubbub, and optionally for use with Zend\\Feed\\Reader",
-        "zendframework/zend-servicemanager": "Zend\\ServiceManager component, for default/recommended ExtensionManager implementations",
-        "zendframework/zend-validator": "Zend\\Validator component"
+        "zendframework/zend-servicemanager": "Zend\\ServiceManager component, for easily extending ExtensionManager implementations",
+        "zendframework/zend-validator": "Zend\\Validator component, for validating feeds and Atom entries in the Writer subcomponent"
     },
     "minimum-stability": "dev",
     "prefer-stable": true,
     "extra": {
         "branch-alias": {
-            "dev-master": "2.5-dev",
-            "dev-develop": "2.6-dev"
+            "dev-master": "2.6-dev",
+            "dev-develop": "2.7-dev"
         }
     },
     "autoload-dev": {
@@ -46,4 +47,4 @@
             "ZendTest\\Feed\\": "test/"
         }
     }
-}
\ No newline at end of file
+}
diff --git a/vendor/zendframework/zend-feed/src/Reader/Entry/Atom.php b/vendor/zendframework/zend-feed/src/Reader/Entry/Atom.php
index c68f360..84efaad 100644
--- a/vendor/zendframework/zend-feed/src/Reader/Entry/Atom.php
+++ b/vendor/zendframework/zend-feed/src/Reader/Entry/Atom.php
@@ -104,7 +104,7 @@ public function getContent()
     /**
      * Get the entry creation date
      *
-     * @return string
+     * @return \DateTime
      */
     public function getDateCreated()
     {
@@ -122,7 +122,7 @@ public function getDateCreated()
     /**
      * Get the entry modification date
      *
-     * @return string
+     * @return \DateTime
      */
     public function getDateModified()
     {
diff --git a/vendor/zendframework/zend-feed/src/Reader/Entry/EntryInterface.php b/vendor/zendframework/zend-feed/src/Reader/Entry/EntryInterface.php
index c5e5fb2..250f4b6 100644
--- a/vendor/zendframework/zend-feed/src/Reader/Entry/EntryInterface.php
+++ b/vendor/zendframework/zend-feed/src/Reader/Entry/EntryInterface.php
@@ -38,14 +38,14 @@ public function getContent();
     /**
      * Get the entry creation date
      *
-     * @return string
+     * @return \DateTime
      */
     public function getDateCreated();
 
     /**
      * Get the entry modification date
      *
-     * @return string
+     * @return \DateTime
      */
     public function getDateModified();
 
diff --git a/vendor/zendframework/zend-feed/src/Reader/Entry/Rss.php b/vendor/zendframework/zend-feed/src/Reader/Entry/Rss.php
index b55fdad..0832ba3 100644
--- a/vendor/zendframework/zend-feed/src/Reader/Entry/Rss.php
+++ b/vendor/zendframework/zend-feed/src/Reader/Entry/Rss.php
@@ -167,7 +167,7 @@ public function getContent()
     /**
      * Get the entry's date of creation
      *
-     * @return string
+     * @return \DateTime
      */
     public function getDateCreated()
     {
@@ -178,7 +178,7 @@ public function getDateCreated()
      * Get the entry's date of modification
      *
      * @throws Exception\RuntimeException
-     * @return string
+     * @return \DateTime
      */
     public function getDateModified()
     {
diff --git a/vendor/zendframework/zend-feed/src/Reader/Reader.php b/vendor/zendframework/zend-feed/src/Reader/Reader.php
index 09bdcf4..693a3e2 100644
--- a/vendor/zendframework/zend-feed/src/Reader/Reader.php
+++ b/vendor/zendframework/zend-feed/src/Reader/Reader.php
@@ -14,6 +14,7 @@
 use Zend\Cache\Storage\StorageInterface as CacheStorage;
 use Zend\Http as ZendHttp;
 use Zend\Stdlib\ErrorHandler;
+use Zend\Feed\Reader\Exception\InvalidHttpClientException;
 
 /**
 */
@@ -57,7 +58,7 @@ class Reader implements ReaderImportInterface
     /**
      * HTTP client object to use for retrieving feeds
      *
-     * @var ZendHttp\Client
+     * @var Http\ClientInterface
      */
     protected static $httpClient = null;
 
@@ -117,23 +118,30 @@ public static function setCache(CacheStorage $cache)
      *
      * Sets the HTTP client object to use for retrieving the feeds.
      *
-     * @param  ZendHttp\Client $httpClient
+     * @param  ZendHttp\Client | Http\ClientInterface $httpClient
      * @return void
      */
-    public static function setHttpClient(ZendHttp\Client $httpClient)
+    public static function setHttpClient($httpClient)
     {
+        if ($httpClient instanceof ZendHttp\Client) {
+            $httpClient = new Http\ZendHttpClientDecorator($httpClient);
+        }
+
+        if (! $httpClient instanceof Http\ClientInterface) {
+            throw new InvalidHttpClientException();
+        }
         static::$httpClient = $httpClient;
     }
 
     /**
      * Gets the HTTP client object. If none is set, a new ZendHttp\Client will be used.
      *
-     * @return ZendHttp\Client
+     * @return Http\ClientInterface
      */
     public static function getHttpClient()
     {
-        if (!static::$httpClient instanceof ZendHttp\Client) {
-            static::$httpClient = new ZendHttp\Client();
+        if (! static::$httpClient) {
+            static::$httpClient = new Http\ZendHttpClientDecorator(new ZendHttp\Client());
         }
 
         return static::$httpClient;
@@ -189,17 +197,16 @@ public static function useHttpConditionalGet($bool = true)
      */
     public static function import($uri, $etag = null, $lastModified = null)
     {
-        $cache       = self::getCache();
-        $client      = self::getHttpClient();
-        $client->resetParameters();
-        $headers = new ZendHttp\Headers();
-        $client->setHeaders($headers);
-        $client->setUri($uri);
+        $cache   = self::getCache();
+        $client  = self::getHttpClient();
         $cacheId = 'Zend_Feed_Reader_' . md5($uri);
 
         if (static::$httpConditionalGet && $cache) {
-            $data = $cache->getItem($cacheId);
-            if ($data) {
+            $headers = [];
+            $data    = $cache->getItem($cacheId);
+            if ($data && $client instanceof Http\HeaderAwareClientInterface) {
+                // Only check for ETag and last modified values in the cache
+                // if we have a client capable of emitting headers in the first place.
                 if ($etag === null) {
                     $etag = $cache->getItem($cacheId . '_etag');
                 }
@@ -207,13 +214,13 @@ public static function import($uri, $etag = null, $lastModified = null)
                     $lastModified = $cache->getItem($cacheId . '_lastmodified');
                 }
                 if ($etag) {
-                    $headers->addHeaderLine('If-None-Match', $etag);
+                    $headers['If-None-Match'] = [$etag];
                 }
                 if ($lastModified) {
-                    $headers->addHeaderLine('If-Modified-Since', $lastModified);
+                    $headers['If-Modified-Since'] = [$lastModified];
                 }
             }
-            $response = $client->send();
+            $response = $client->get($uri, $headers);
             if ($response->getStatusCode() !== 200 && $response->getStatusCode() !== 304) {
                 throw new Exception\RuntimeException('Feed failed to load, got response code ' . $response->getStatusCode());
             }
@@ -222,11 +229,14 @@ public static function import($uri, $etag = null, $lastModified = null)
             } else {
                 $responseXml = $response->getBody();
                 $cache->setItem($cacheId, $responseXml);
-                if ($response->getHeaders()->get('ETag')) {
-                    $cache->setItem($cacheId . '_etag', $response->getHeaders()->get('ETag')->getFieldValue());
-                }
-                if ($response->getHeaders()->get('Last-Modified')) {
-                    $cache->setItem($cacheId . '_lastmodified', $response->getHeaders()->get('Last-Modified')->getFieldValue());
+
+                if ($response instanceof Http\HeaderAwareResponseInterface) {
+                    if ($response->getHeaderLine('ETag', false)) {
+                        $cache->setItem($cacheId . '_etag', $response->getHeaderLine('ETag'));
+                    }
+                    if ($response->getHeaderLine('Last-Modified', false)) {
+                        $cache->setItem($cacheId . '_lastmodified', $response->getHeaderLine('Last-Modified'));
+                    }
                 }
             }
             return static::importString($responseXml);
@@ -235,7 +245,7 @@ public static function import($uri, $etag = null, $lastModified = null)
             if ($data) {
                 return static::importString($data);
             }
-            $response = $client->send();
+            $response = $client->get($uri);
             if ((int) $response->getStatusCode() !== 200) {
                 throw new Exception\RuntimeException('Feed failed to load, got response code ' . $response->getStatusCode());
             }
@@ -243,7 +253,7 @@ public static function import($uri, $etag = null, $lastModified = null)
             $cache->setItem($cacheId, $responseXml);
             return static::importString($responseXml);
         } else {
-            $response = $client->send();
+            $response = $client->get($uri);
             if ((int) $response->getStatusCode() !== 200) {
                 throw new Exception\RuntimeException('Feed failed to load, got response code ' . $response->getStatusCode());
             }
@@ -270,7 +280,7 @@ public static function import($uri, $etag = null, $lastModified = null)
     public static function importRemoteFeed($uri, Http\ClientInterface $client)
     {
         $response = $client->get($uri);
-        if (!$response instanceof Http\ResponseInterface) {
+        if (! $response instanceof Http\ResponseInterface) {
             throw new Exception\RuntimeException(sprintf(
                 'Did not receive a %s\Http\ResponseInterface from the provided HTTP client; received "%s"',
                 __NAMESPACE__,
@@ -371,9 +381,8 @@ public static function importFile($filename)
      */
     public static function findFeedLinks($uri)
     {
-        $client = static::getHttpClient();
-        $client->setUri($uri);
-        $response = $client->send();
+        $client   = static::getHttpClient();
+        $response = $client->get($uri);
         if ($response->getStatusCode() !== 200) {
             throw new Exception\RuntimeException("Failed to access $uri, got response code " . $response->getStatusCode());
         }
diff --git a/vendor/zendframework/zend-feed/src/Writer/Extension/ITunes/Feed.php b/vendor/zendframework/zend-feed/src/Writer/Extension/ITunes/Feed.php
index 0b21b3b..054fe3e 100644
--- a/vendor/zendframework/zend-feed/src/Writer/Extension/ITunes/Feed.php
+++ b/vendor/zendframework/zend-feed/src/Writer/Extension/ITunes/Feed.php
@@ -14,8 +14,6 @@
 use Zend\Stdlib\StringUtils;
 use Zend\Stdlib\StringWrapper\StringWrapperInterface;
 
-/**
-*/
 class Feed
 {
     /**
diff --git a/vendor/zendframework/zend-feed/src/Writer/ExtensionManager.php b/vendor/zendframework/zend-feed/src/Writer/ExtensionManager.php
index b0e0e3b..a7efb3e 100644
--- a/vendor/zendframework/zend-feed/src/Writer/ExtensionManager.php
+++ b/vendor/zendframework/zend-feed/src/Writer/ExtensionManager.php
@@ -12,7 +12,7 @@
 /**
  * Default implementation of ExtensionManagerInterface
  *
- * Decorator of ExtensionPluginManager.
+ * Decorator for an ExtensionManagerInstance.
  */
 class ExtensionManager implements ExtensionManagerInterface
 {
@@ -22,14 +22,14 @@ class ExtensionManager implements ExtensionManagerInterface
      * Constructor
      *
      * Seeds the extension manager with a plugin manager; if none provided,
-     * creates an instance.
+     * creates and decorates an instance of StandaloneExtensionManager.
      *
-     * @param  null|ExtensionPluginManager $pluginManager
+     * @param  null|ExtensionManagerInterface $pluginManager
      */
-    public function __construct(ExtensionPluginManager $pluginManager = null)
+    public function __construct(ExtensionManagerInterface $pluginManager = null)
     {
         if (null === $pluginManager) {
-            $pluginManager = new ExtensionPluginManager();
+            $pluginManager = new StandaloneExtensionManager();
         }
         $this->pluginManager = $pluginManager;
     }
@@ -37,7 +37,7 @@ public function __construct(ExtensionPluginManager $pluginManager = null)
     /**
      * Method overloading
      *
-     * Proxy to composed ExtensionPluginManager instance.
+     * Proxy to composed ExtensionManagerInterface instance.
      *
      * @param  string $method
      * @param  array $args
diff --git a/vendor/zendframework/zend-feed/src/Writer/Writer.php b/vendor/zendframework/zend-feed/src/Writer/Writer.php
index a4f95bf..4c1e257 100644
--- a/vendor/zendframework/zend-feed/src/Writer/Writer.php
+++ b/vendor/zendframework/zend-feed/src/Writer/Writer.php
@@ -105,13 +105,16 @@ public static function registerExtension($name)
                 return;
             }
         }
-        if (!$manager->has($feedName)
-            && !$manager->has($entryName)
-            && !$manager->has($feedRendererName)
-            && !$manager->has($entryRendererName)
+        if (! $manager->has($feedName)
+            && ! $manager->has($entryName)
+            && ! $manager->has($feedRendererName)
+            && ! $manager->has($entryRendererName)
         ) {
-            throw new Exception\RuntimeException('Could not load extension: ' . $name
-                . 'using Plugin Loader. Check prefix paths are configured and extension exists.');
+            throw new Exception\RuntimeException(sprintf(
+                'Could not load extension "%s" using Plugin Loader. '
+                . 'Check prefix paths are configured and extension exists.',
+                $name
+            ));
         }
         if ($manager->has($feedName)) {
             static::$extensions['feed'][] = $feedName;