EZP-23494: Sync settings from symfony standard completly
Merge pull request #197 from ezsystems/symfony-standard-sync-2.5.5

EZP-23494: Sync settings from symfony standard completly
EZP-22400: Added FOSHttpCacheBundle
EZP-22400: Added Varnish samples
EZP-22400: Point to ezpublish-kernel: impl_EZP-22400_FOSHttpCacheBundle