EZP-22400: Added FOSHttpCacheBundle
EZP-22400: Added Varnish samples
EZP-22400: Point to ezpublish-kernel: impl_EZP-22400_FOSHttpCacheBundle
EZP-22400: Fixed VCL for Varnish 4
Changed comment character in VCL examples + Ensure "no-cache", "no-store" and "private" values in Cache-control are not cached
EZP-22400: Varnish 4: Set grace to 1h
EZP-22400: Removed commented code in VCL
EZP-22400: Renamed 'purgers' to 'invalidators' for clarity
EZP-22400: Point back ezpublish-kernel to dev-master
EZP-22400: Dependencies adjustements
EZP-22400: Only support BAN requests for invalidation
EZP-22400: Added note about FOSHttpCacheBundle usage
EZP-22400: Use default Varnish behavior with 'hit_for_pass'
Merge pull request #198 from ezsystems/impl_EZP-22400_FOSHttpCacheBundle

EZP-22400: Use FOSHttpCacheBundle
Removed explicit dependency of LiipImagineBundle

As it's already a dependency of ezpublish-kernel...
Merge branch 'master' into extensible_kernel-clean