diff --git a/core/composer.json b/core/composer.json
index 4bedbf0..e989ed0 100644
--- a/core/composer.json
+++ b/core/composer.json
@@ -16,7 +16,8 @@
     "guzzle/http": "3.1.*@stable",
     "kriswallsmith/assetic": "1.1.*@alpha",
     "symfony-cmf/routing": "1.0.*@dev",
-    "easyrdf/easyrdf": "dev-master"
+    "easyrdf/easyrdf": "dev-master",
+    "psr/log": "1.*@stable"
   },
   "minimum-stability": "dev"
 }
diff --git a/core/composer.lock b/core/composer.lock
index bd6e3ea..2258e3a 100644
--- a/core/composer.lock
+++ b/core/composer.lock
@@ -1,5 +1,5 @@
 {
-    "hash": "9dba4484f19203d80a4d60c987df2e59",
+    "hash": "617de25a2510113c9b380bee89ba59d6",
     "packages": [
         {
             "name": "doctrine/common",
@@ -379,6 +379,44 @@
             ]
         },
         {
+            "name": "psr/log",
+            "version": "1.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/log",
+                "reference": "1.0.0"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://github.com/php-fig/log/archive/1.0.0.zip",
+                "reference": "1.0.0",
+                "shasum": ""
+            },
+            "time": "2012-12-21 11:40:51",
+            "type": "library",
+            "autoload": {
+                "psr-0": {
+                    "Psr\\Log\\": ""
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for logging libraries",
+            "keywords": [
+                "log",
+                "psr",
+                "psr-3"
+            ]
+        },
+        {
             "name": "symfony-cmf/routing",
             "version": "dev-master",
             "target-dir": "Symfony/Cmf/Component/Routing",
@@ -959,6 +997,7 @@
         "guzzle/http": 0,
         "kriswallsmith/assetic": 15,
         "symfony-cmf/routing": 20,
-        "easyrdf/easyrdf": 20
+        "easyrdf/easyrdf": 20,
+        "psr/log": 0
     }
 }
diff --git a/core/lib/Drupal/Core/CoreBundle.php b/core/lib/Drupal/Core/CoreBundle.php
index 2076707..fef8058 100644
--- a/core/lib/Drupal/Core/CoreBundle.php
+++ b/core/lib/Drupal/Core/CoreBundle.php
@@ -236,6 +236,8 @@ public function build(ContainerBuilder $container) {
     $container->register('flood', 'Drupal\Core\Flood\DatabaseBackend')
       ->addArgument(new Reference('database'));
 
+    $container->register('logger.watchdog', 'Drupal\Core\WatchdogLogger');
+
     $container->addCompilerPass(new RegisterMatchersPass());
     $container->addCompilerPass(new RegisterRouteFiltersPass());
     // Add a compiler pass for registering event subscribers.
diff --git a/core/lib/Drupal/Core/WatchdogLogger.php b/core/lib/Drupal/Core/WatchdogLogger.php
new file mode 100644
index 0000000..60b38e1
--- /dev/null
+++ b/core/lib/Drupal/Core/WatchdogLogger.php
@@ -0,0 +1,85 @@
+<?php
+
+/**
+ * @file
+ * Contains Drupal\Core\WatchdogLogger.
+ */
+
+namespace Drupal\Core;
+
+use Psr\Log\AbstractLogger;
+use Psr\Log\LogLevel;
+
+/**
+ * Watchdog-backed implementation of the PSR-3 Logger interface.
+ */
+class WatchdogLogger extends AbstractLogger {
+
+  /**
+   * Map of PSR Log constants to Watchdog log constants.
+   *
+   * @var array
+   */
+  protected $levelTranslation;
+
+  /**
+   * Logs with an arbitrary level.
+   *
+   * @param mixed $level
+   *   One of the log levels defined by \Psr\Log\LogLevel.
+   * @param string $message
+   *   The message to record.
+   * @param array $context
+   *   An array of additional information relevant to this message. These values
+   *   may be substitued into the message.
+   *
+   * @return null
+   */
+  public function log($level, $message, array $context = array()) {
+
+    $type = isset($context['type']) ? $context['type'] : 'system';
+    $link = isset($context['link']) ? $context['link'] : NULL;
+
+    unset($context['type'], $context['link']);
+
+    // Escape all values in the message, but convert them to watchdog format.
+    $message = preg_replace('/\{(.*)\}/', '@$1', $message);
+
+    // Translate the context into the variables key of watchdog messages.
+    $variables = array();
+    foreach ($context as $key => $element) {
+      if ($key != 'exception') {
+        $variables['@' . $key] = $element;
+      }
+    }
+
+    watchdog($type, $message, $variables, $this->mapLevel($level), $link);
+  }
+
+  /**
+   * Converts a PSR Log level to a Watchdog log level.
+   *
+   * @param string $level
+   *   A PSR-3 logging level string.
+   *
+   * @return int
+   *   The corresponding Watchdog constant.
+   */
+  protected function mapLevel($level) {
+    if (empty($this->levelTranslation)) {
+      $this->levelTranslation = array(
+        LogLevel::ALERT => WATCHDOG_ALERT,
+        LogLevel::CRITICAL => WATCHDOG_CRITICAL,
+        LogLevel::DEBUG => WATCHDOG_DEBUG,
+        LogLevel::EMERGENCY => WATCHDOG_EMERGENCY,
+        LogLevel::ERROR => WATCHDOG_ERROR,
+        LogLevel::INFO => WATCHDOG_INFO,
+        LogLevel::NOTICE => WATCHDOG_NOTICE,
+        LogLevel::WARNING => WATCHDOG_WARNING,
+      );
+    }
+
+    return $this->levelTranslation[$level];
+  }
+
+}
diff --git a/core/vendor/autoload.php b/core/vendor/autoload.php
index 517fa0b..e0ca66b 100644
--- a/core/vendor/autoload.php
+++ b/core/vendor/autoload.php
@@ -4,4 +4,4 @@
 
 require_once __DIR__ . '/composer' . '/autoload_real.php';
 
-return ComposerAutoloaderInitcb954419c7531cdb839507174df5e8bb::getLoader();
+return ComposerAutoloaderInit8febf6c7f95cfce1ab78dab40c0b97bf::getLoader();
diff --git a/core/vendor/composer/autoload_namespaces.php b/core/vendor/composer/autoload_namespaces.php
index 913d6b8..49bab64 100644
--- a/core/vendor/composer/autoload_namespaces.php
+++ b/core/vendor/composer/autoload_namespaces.php
@@ -17,6 +17,7 @@
     'Symfony\\Component\\DependencyInjection\\' => $vendorDir . '/symfony/dependency-injection/',
     'Symfony\\Component\\ClassLoader\\' => $vendorDir . '/symfony/class-loader/',
     'Symfony\\Cmf\\Component\\Routing' => $vendorDir . '/symfony-cmf/routing/',
+    'Psr\\Log\\' => $vendorDir . '/psr/log/',
     'Guzzle\\Stream' => $vendorDir . '/guzzle/stream/',
     'Guzzle\\Parser' => $vendorDir . '/guzzle/parser/',
     'Guzzle\\Http' => $vendorDir . '/guzzle/http/',
diff --git a/core/vendor/composer/autoload_real.php b/core/vendor/composer/autoload_real.php
index a7159a2..b067a02 100644
--- a/core/vendor/composer/autoload_real.php
+++ b/core/vendor/composer/autoload_real.php
@@ -2,7 +2,7 @@
 
 // autoload_real.php generated by Composer
 
-class ComposerAutoloaderInitcb954419c7531cdb839507174df5e8bb
+class ComposerAutoloaderInit8febf6c7f95cfce1ab78dab40c0b97bf
 {
     private static $loader;
 
@@ -19,9 +19,9 @@ public static function getLoader()
             return self::$loader;
         }
 
-        spl_autoload_register(array('ComposerAutoloaderInitcb954419c7531cdb839507174df5e8bb', 'loadClassLoader'));
+        spl_autoload_register(array('ComposerAutoloaderInit8febf6c7f95cfce1ab78dab40c0b97bf', 'loadClassLoader'));
         self::$loader = $loader = new \Composer\Autoload\ClassLoader();
-        spl_autoload_unregister(array('ComposerAutoloaderInitcb954419c7531cdb839507174df5e8bb', 'loadClassLoader'));
+        spl_autoload_unregister(array('ComposerAutoloaderInit8febf6c7f95cfce1ab78dab40c0b97bf', 'loadClassLoader'));
 
         $vendorDir = dirname(__DIR__);
         $baseDir = dirname($vendorDir);
diff --git a/core/vendor/composer/installed.json b/core/vendor/composer/installed.json
index 4822cd3..03c3dcd 100644
--- a/core/vendor/composer/installed.json
+++ b/core/vendor/composer/installed.json
@@ -980,5 +980,45 @@
             "Turtle",
             "Linked Data"
         ]
+    },
+    {
+        "name": "psr/log",
+        "version": "1.0.0",
+        "version_normalized": "1.0.0.0",
+        "source": {
+            "type": "git",
+            "url": "https://github.com/php-fig/log",
+            "reference": "1.0.0"
+        },
+        "dist": {
+            "type": "zip",
+            "url": "https://github.com/php-fig/log/archive/1.0.0.zip",
+            "reference": "1.0.0",
+            "shasum": ""
+        },
+        "time": "2012-12-21 11:40:51",
+        "type": "library",
+        "installation-source": "dist",
+        "autoload": {
+            "psr-0": {
+                "Psr\\Log\\": ""
+            }
+        },
+        "notification-url": "https://packagist.org/downloads/",
+        "license": [
+            "MIT"
+        ],
+        "authors": [
+            {
+                "name": "PHP-FIG",
+                "homepage": "http://www.php-fig.org/"
+            }
+        ],
+        "description": "Common interface for logging libraries",
+        "keywords": [
+            "log",
+            "psr",
+            "psr-3"
+        ]
     }
 ]
diff --git a/core/vendor/psr/log/.gitignore b/core/vendor/psr/log/.gitignore
new file mode 100644
index 0000000..22d0d82
--- /dev/null
+++ b/core/vendor/psr/log/.gitignore
@@ -0,0 +1 @@
+vendor
diff --git a/core/vendor/psr/log/LICENSE b/core/vendor/psr/log/LICENSE
new file mode 100644
index 0000000..474c952
--- /dev/null
+++ b/core/vendor/psr/log/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2012 PHP Framework Interoperability Group
+
+Permission is hereby granted, free of charge, to any person obtaining a copy 
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights 
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 
+copies of the Software, and to permit persons to whom the Software is 
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in 
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/core/vendor/psr/log/Psr/Log/AbstractLogger.php b/core/vendor/psr/log/Psr/Log/AbstractLogger.php
new file mode 100644
index 0000000..00f9034
--- /dev/null
+++ b/core/vendor/psr/log/Psr/Log/AbstractLogger.php
@@ -0,0 +1,120 @@
+<?php
+
+namespace Psr\Log;
+
+/**
+ * This is a simple Logger implementation that other Loggers can inherit from.
+ *
+ * It simply delegates all log-level-specific methods to the `log` method to
+ * reduce boilerplate code that a simple Logger that does the same thing with
+ * messages regardless of the error level has to implement.
+ */
+abstract class AbstractLogger implements LoggerInterface
+{
+    /**
+     * System is unusable.
+     *
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    public function emergency($message, array $context = array())
+    {
+        $this->log(LogLevel::EMERGENCY, $message, $context);
+    }
+
+    /**
+     * Action must be taken immediately.
+     *
+     * Example: Entire website down, database unavailable, etc. This should
+     * trigger the SMS alerts and wake you up.
+     *
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    public function alert($message, array $context = array())
+    {
+        $this->log(LogLevel::ALERT, $message, $context);
+    }
+
+    /**
+     * Critical conditions.
+     *
+     * Example: Application component unavailable, unexpected exception.
+     *
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    public function critical($message, array $context = array())
+    {
+        $this->log(LogLevel::CRITICAL, $message, $context);
+    }
+
+    /**
+     * Runtime errors that do not require immediate action but should typically
+     * be logged and monitored.
+     *
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    public function error($message, array $context = array())
+    {
+        $this->log(LogLevel::ERROR, $message, $context);
+    }
+
+    /**
+     * Exceptional occurrences that are not errors.
+     *
+     * Example: Use of deprecated APIs, poor use of an API, undesirable things
+     * that are not necessarily wrong.
+     *
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    public function warning($message, array $context = array())
+    {
+        $this->log(LogLevel::WARNING, $message, $context);
+    }
+
+    /**
+     * Normal but significant events.
+     *
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    public function notice($message, array $context = array())
+    {
+        $this->log(LogLevel::NOTICE, $message, $context);
+    }
+
+    /**
+     * Interesting events.
+     *
+     * Example: User logs in, SQL logs.
+     *
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    public function info($message, array $context = array())
+    {
+        $this->log(LogLevel::INFO, $message, $context);
+    }
+
+    /**
+     * Detailed debug information.
+     *
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    public function debug($message, array $context = array())
+    {
+        $this->log(LogLevel::DEBUG, $message, $context);
+    }
+}
diff --git a/core/vendor/psr/log/Psr/Log/InvalidArgumentException.php b/core/vendor/psr/log/Psr/Log/InvalidArgumentException.php
new file mode 100644
index 0000000..67f852d
--- /dev/null
+++ b/core/vendor/psr/log/Psr/Log/InvalidArgumentException.php
@@ -0,0 +1,7 @@
+<?php
+
+namespace Psr\Log;
+
+class InvalidArgumentException extends \InvalidArgumentException
+{
+}
diff --git a/core/vendor/psr/log/Psr/Log/LogLevel.php b/core/vendor/psr/log/Psr/Log/LogLevel.php
new file mode 100644
index 0000000..e32c151
--- /dev/null
+++ b/core/vendor/psr/log/Psr/Log/LogLevel.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace Psr\Log;
+
+/**
+ * Describes log levels
+ */
+class LogLevel
+{
+    const EMERGENCY = 'emergency';
+    const ALERT = 'alert';
+    const CRITICAL = 'critical';
+    const ERROR = 'error';
+    const WARNING = 'warning';
+    const NOTICE = 'notice';
+    const INFO = 'info';
+    const DEBUG = 'debug';
+}
diff --git a/core/vendor/psr/log/Psr/Log/LoggerAwareInterface.php b/core/vendor/psr/log/Psr/Log/LoggerAwareInterface.php
new file mode 100644
index 0000000..2eebc4e
--- /dev/null
+++ b/core/vendor/psr/log/Psr/Log/LoggerAwareInterface.php
@@ -0,0 +1,17 @@
+<?php
+
+namespace Psr\Log;
+
+/**
+ * Describes a logger-aware instance
+ */
+interface LoggerAwareInterface
+{
+    /**
+     * Sets a logger instance on the object
+     *
+     * @param LoggerInterface $logger
+     * @return null
+     */
+    public function setLogger(LoggerInterface $logger);
+}
diff --git a/core/vendor/psr/log/Psr/Log/LoggerAwareTrait.php b/core/vendor/psr/log/Psr/Log/LoggerAwareTrait.php
new file mode 100644
index 0000000..f087a3d
--- /dev/null
+++ b/core/vendor/psr/log/Psr/Log/LoggerAwareTrait.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace Psr\Log;
+
+/**
+ * Basic Implementation of LoggerAwareInterface.
+ */
+trait LoggerAwareTrait
+{
+    /** @var LoggerInterface */
+    protected $logger;
+
+    /**
+     * Sets a logger.
+     * 
+     * @param LoggerInterface $logger
+     */
+    public function setLogger(LoggerInterface $logger)
+    {
+        $this->logger = $logger;
+    }
+}
diff --git a/core/vendor/psr/log/Psr/Log/LoggerInterface.php b/core/vendor/psr/log/Psr/Log/LoggerInterface.php
new file mode 100644
index 0000000..476bb96
--- /dev/null
+++ b/core/vendor/psr/log/Psr/Log/LoggerInterface.php
@@ -0,0 +1,114 @@
+<?php
+
+namespace Psr\Log;
+
+/**
+ * Describes a logger instance
+ *
+ * The message MUST be a string or object implementing __toString().
+ *
+ * The message MAY contain placeholders in the form: {foo} where foo
+ * will be replaced by the context data in key "foo".
+ *
+ * The context array can contain arbitrary data, the only assumption that
+ * can be made by implementors is that if an Exception instance is given
+ * to produce a stack trace, it MUST be in a key named "exception".
+ *
+ * See https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-3-logger-interface.md
+ * for the full interface specification.
+ */
+interface LoggerInterface
+{
+    /**
+     * System is unusable.
+     *
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    public function emergency($message, array $context = array());
+
+    /**
+     * Action must be taken immediately.
+     *
+     * Example: Entire website down, database unavailable, etc. This should
+     * trigger the SMS alerts and wake you up.
+     *
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    public function alert($message, array $context = array());
+
+    /**
+     * Critical conditions.
+     *
+     * Example: Application component unavailable, unexpected exception.
+     *
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    public function critical($message, array $context = array());
+
+    /**
+     * Runtime errors that do not require immediate action but should typically
+     * be logged and monitored.
+     *
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    public function error($message, array $context = array());
+
+    /**
+     * Exceptional occurrences that are not errors.
+     *
+     * Example: Use of deprecated APIs, poor use of an API, undesirable things
+     * that are not necessarily wrong.
+     *
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    public function warning($message, array $context = array());
+
+    /**
+     * Normal but significant events.
+     *
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    public function notice($message, array $context = array());
+
+    /**
+     * Interesting events.
+     *
+     * Example: User logs in, SQL logs.
+     *
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    public function info($message, array $context = array());
+
+    /**
+     * Detailed debug information.
+     *
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    public function debug($message, array $context = array());
+
+    /**
+     * Logs with an arbitrary level.
+     *
+     * @param mixed $level
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    public function log($level, $message, array $context = array());
+}
diff --git a/core/vendor/psr/log/Psr/Log/LoggerTrait.php b/core/vendor/psr/log/Psr/Log/LoggerTrait.php
new file mode 100644
index 0000000..5912496
--- /dev/null
+++ b/core/vendor/psr/log/Psr/Log/LoggerTrait.php
@@ -0,0 +1,131 @@
+<?php
+
+namespace Psr\Log;
+
+/**
+ * This is a simple Logger trait that classes unable to extend AbstractLogger
+ * (because they extend another class, etc) can include.
+ *
+ * It simply delegates all log-level-specific methods to the `log` method to 
+ * reduce boilerplate code that a simple Logger that does the same thing with 
+ * messages regardless of the error level has to implement.
+ */
+trait LoggerTrait
+{
+    /**
+     * System is unusable.
+     *
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    public function emergency($message, array $context = array())
+    {
+        $this->log(LogLevel::EMERGENCY, $message, $context);
+    }
+
+    /**
+     * Action must be taken immediately.
+     *
+     * Example: Entire website down, database unavailable, etc. This should
+     * trigger the SMS alerts and wake you up.
+     *
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    public function alert($message, array $context = array())
+    {
+        $this->log(LogLevel::ALERT, $message, $context);
+    }
+
+    /**
+     * Critical conditions.
+     *
+     * Example: Application component unavailable, unexpected exception.
+     *
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    public function critical($message, array $context = array())
+    {
+        $this->log(LogLevel::CRITICAL, $message, $context);
+    }
+
+    /**
+     * Runtime errors that do not require immediate action but should typically
+     * be logged and monitored.
+     *
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    public function error($message, array $context = array())
+    {
+        $this->log(LogLevel::ERROR, $message, $context);
+    }
+
+    /**
+     * Exceptional occurrences that are not errors.
+     *
+     * Example: Use of deprecated APIs, poor use of an API, undesirable things
+     * that are not necessarily wrong.
+     *
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    public function warning($message, array $context = array())
+    {
+        $this->log(LogLevel::WARNING, $message, $context);
+    }
+
+    /**
+     * Normal but significant events.
+     *
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    public function notice($message, array $context = array())
+    {
+        $this->log(LogLevel::NOTICE, $message, $context);
+    }
+
+    /**
+     * Interesting events.
+     *
+     * Example: User logs in, SQL logs.
+     *
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    public function info($message, array $context = array())
+    {
+        $this->log(LogLevel::INFO, $message, $context);
+    }
+
+    /**
+     * Detailed debug information.
+     *
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    public function debug($message, array $context = array())
+    {
+        $this->log(LogLevel::DEBUG, $message, $context);
+    }
+
+    /**
+     * Logs with an arbitrary level.
+     *
+     * @param mixed $level
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    abstract public function log($level, $message, array $context = array());
+}
diff --git a/core/vendor/psr/log/Psr/Log/NullLogger.php b/core/vendor/psr/log/Psr/Log/NullLogger.php
new file mode 100644
index 0000000..553a3c5
--- /dev/null
+++ b/core/vendor/psr/log/Psr/Log/NullLogger.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace Psr\Log;
+
+/**
+ * This Logger can be used to avoid conditional log calls
+ *
+ * Logging should always be optional, and if no logger is provided to your
+ * library creating a NullLogger instance to have something to throw logs at
+ * is a good way to avoid littering your code with `if ($this->logger) { }`
+ * blocks.
+ */
+class NullLogger extends AbstractLogger
+{
+    /**
+     * Logs with an arbitrary level.
+     *
+     * @param mixed $level
+     * @param string $message
+     * @param array $context
+     * @return null
+     */
+    public function log($level, $message, array $context = array())
+    {
+        // noop
+    }
+}
diff --git a/core/vendor/psr/log/Psr/Log/Test/LoggerInterfaceTest.php b/core/vendor/psr/log/Psr/Log/Test/LoggerInterfaceTest.php
new file mode 100644
index 0000000..a932815
--- /dev/null
+++ b/core/vendor/psr/log/Psr/Log/Test/LoggerInterfaceTest.php
@@ -0,0 +1,116 @@
+<?php
+
+namespace Psr\Log\Test;
+
+use Psr\Log\LogLevel;
+
+/**
+ * Provides a base test class for ensuring compliance with the LoggerInterface
+ *
+ * Implementors can extend the class and implement abstract methods to run this as part of their test suite
+ */
+abstract class LoggerInterfaceTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @return LoggerInterface
+     */
+    abstract function getLogger();
+
+    /**
+     * This must return the log messages in order with a simple formatting: "<LOG LEVEL> <MESSAGE>"
+     *
+     * Example ->error('Foo') would yield "error Foo"
+     *
+     * @return string[]
+     */
+    abstract function getLogs();
+
+    public function testImplements()
+    {
+        $this->assertInstanceOf('Psr\Log\LoggerInterface', $this->getLogger());
+    }
+
+    /**
+     * @dataProvider provideLevelsAndMessages
+     */
+    public function testLogsAtAllLevels($level, $message)
+    {
+        $logger = $this->getLogger();
+        $logger->{$level}($message, array('user' => 'Bob'));
+        $logger->log($level, $message, array('user' => 'Bob'));
+
+        $expected = array(
+            $level.' message of level '.$level.' with context: Bob',
+            $level.' message of level '.$level.' with context: Bob',
+        );
+        $this->assertEquals($expected, $this->getLogs());
+    }
+
+    public function provideLevelsAndMessages()
+    {
+        return array(
+            LogLevel::EMERGENCY => array(LogLevel::EMERGENCY, 'message of level emergency with context: {user}'),
+            LogLevel::ALERT => array(LogLevel::ALERT, 'message of level alert with context: {user}'),
+            LogLevel::CRITICAL => array(LogLevel::CRITICAL, 'message of level critical with context: {user}'),
+            LogLevel::ERROR => array(LogLevel::ERROR, 'message of level error with context: {user}'),
+            LogLevel::WARNING => array(LogLevel::WARNING, 'message of level warning with context: {user}'),
+            LogLevel::NOTICE => array(LogLevel::NOTICE, 'message of level notice with context: {user}'),
+            LogLevel::INFO => array(LogLevel::INFO, 'message of level info with context: {user}'),
+            LogLevel::DEBUG => array(LogLevel::DEBUG, 'message of level debug with context: {user}'),
+        );
+    }
+
+    /**
+     * @expectedException Psr\Log\InvalidArgumentException
+     */
+    public function testThrowsOnInvalidLevel()
+    {
+        $logger = $this->getLogger();
+        $logger->log('invalid level', 'Foo');
+    }
+
+    public function testContextReplacement()
+    {
+        $logger = $this->getLogger();
+        $logger->info('{Message {nothing} {user} {foo.bar} a}', array('user' => 'Bob', 'foo.bar' => 'Bar'));
+
+        $expected = array('info {Message {nothing} Bob Bar a}');
+        $this->assertEquals($expected, $this->getLogs());
+    }
+
+    public function testObjectCastToString()
+    {
+        $dummy = $this->getMock('Psr\Log\Test\DummyTest', array('__toString'));
+        $dummy->expects($this->once())
+            ->method('__toString')
+            ->will($this->returnValue('DUMMY'));
+
+        $this->getLogger()->warning($dummy);
+    }
+
+    public function testContextCanContainAnything()
+    {
+        $context = array(
+            'bool' => true,
+            'null' => null,
+            'string' => 'Foo',
+            'int' => 0,
+            'float' => 0.5,
+            'nested' => array('with object' => new DummyTest),
+            'object' => new \DateTime,
+            'resource' => fopen('php://memory', 'r'),
+        );
+
+        $this->getLogger()->warning('Crazy context data', $context);
+    }
+
+    public function testContextExceptionKeyCanBeExceptionOrOtherValues()
+    {
+        $this->getLogger()->warning('Random message', array('exception' => 'oops'));
+        $this->getLogger()->critical('Uncaught Exception!', array('exception' => new \LogicException('Fail')));
+    }
+}
+
+class DummyTest
+{
+}
\ No newline at end of file
diff --git a/core/vendor/psr/log/README.md b/core/vendor/psr/log/README.md
new file mode 100644
index 0000000..574bc1c
--- /dev/null
+++ b/core/vendor/psr/log/README.md
@@ -0,0 +1,45 @@
+PSR Log
+=======
+
+This repository holds all interfaces/classes/traits related to
+[PSR-3](https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-3-logger-interface.md).
+
+Note that this is not a logger of its own. It is merely an interface that
+describes a logger. See the specification for more details.
+
+Usage
+-----
+
+If you need a logger, you can use the interface like this:
+
+```php
+<?php
+
+use Psr\Log\LoggerInterface;
+
+class Foo
+{
+    private $logger;
+
+    public function __construct(LoggerInterface $logger = null)
+    {
+        $this->logger = $logger;
+    }
+
+    public function doSomething()
+    {
+        if ($this->logger) {
+            $this->logger->info('Doing work');
+        }
+
+        // do something useful
+    }
+}
+```
+
+You can then pick one of the implementations of the interface to get a logger.
+
+If you want to implement the interface, you can require this package and
+implement `Psr\Log\LoggerInterface` in your code. Please read the
+[specification text](https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-3-logger-interface.md)
+for details.
diff --git a/core/vendor/psr/log/composer.json b/core/vendor/psr/log/composer.json
new file mode 100644
index 0000000..6bdcc21
--- /dev/null
+++ b/core/vendor/psr/log/composer.json
@@ -0,0 +1,17 @@
+{
+    "name": "psr/log",
+    "description": "Common interface for logging libraries",
+    "keywords": ["psr", "psr-3", "log"],
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "PHP-FIG",
+            "homepage": "http://www.php-fig.org/"
+        }
+    ],
+    "autoload": {
+        "psr-0": {
+            "Psr\\Log\\": ""
+        }
+    }
+}