advagg 7.x-2.0-alpha2

Upgrade Notes:
If coming from AdvAgg 7.x-1.x or 6.x-1.x the way to upgrade is to uninstall the module before installing 7.x-2.x. Upgrades within the 2.x series will be supported.

Other Modules:
#1946218: test with other modules & themes
CDN - #1942230-6: 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.

Bugs Fixed:
#1943404: CSS: Use media queries to combine all, screen, print, etc media types
#1977914: Errors after clicking Flush AdvAgg Cache
#1986326: PHP fatal errors on advagg.module line 535: Only variables can be passed by reference
#1986574: Undefined index: page_bottom
#1988606: advagg_mod not respecting advagg cookie

New Features:
#1976910: Turn on/off inline css/js compression based off of page is cacheable.
#1743910: Move JS to footer
#1983728: Limit CSS selector count to 4095
#1986208: Css and js not gzip downsized
#1989710: Add drupal_add_js_page_defaults
#1977048: update readme.txt
#1977044: create an advagg.api.php file
#1996802: have advagg-debug=1 output debug info to watchdog
#1996828: Add db cache for advagg_hooks_implemented module_implements calls.