Initial implementation of cache extension
Furthered cache extension implementation, added support for memcache(d) and array caches
Added doctrine/cache suggestion to composer.json
Added CacheConfiguration test
Removed unused imports
Removed broken name node in CacheConfiguration
Fixed some issues in CacheExtension and added test
Fixed typos in SecurityExtension
Added redis CacheExtension test
Added memcache CacheExtension test
Added array cache CacheExtension test
Merge branch 'feature/cache'