advagg 7.x-2.0-rc4

Bugs Fixed:
#2078293: Shared directory feature no longer seems to work: directories are not created
#2081043: Warn on status report if is_https is not set correctly
#2081075: Fix spelling and coder errors
#2076871: Nginx Problem 500 Internal Server Error
#2085617: Advagg + CDN integration + Far Future enabled
#2086723: issue in advagg_save_aggregate via httprl integration
#2088587: Advanced CSS/JS Aggregation breaks older versions of CKEditor
#2090553: Warning: filemtime(): stat failed in advagg_missing_send_saved_file() (line 155 advagg.missing.inc)
#2088563: Yslow gives: Grade F on Add Expires headers
#2081079: Add in hook_update_N to flush out older .htaccess file
#2097033: "cache-control's max-age header" and "The expires header"
#2092287: Typo in advagg_css_compress_advagg_get_css_aggregate_contents_alter()
#1951180: HTTP requests to advagg are not getting though.
#2087151: drush advagg-caf and drush advagg-cdc do not work
#2099601: Missing schema error

New Features:
#2081059: Recommend pecl-jsmin if php >= 5.3.10

Notes for other modules:
CDN - #1942230-14: CDN module AdvAgg 7.x-2.x Integration
CSS Embedded Images - Need 7.x-1.3+
HTTP Parallel Request & Threading Library is not required but is recommended so Aggregates will be built in the background.