Fixed typos
Merge pull request #4 from pborreli/typos

Fixed typos
Fixes #6 and #7. Renamed filesystem and phpfile cache providers to file_system and php_file to match LiipDoctrineCacheBundle.
Implemented support for cache provider aliasing according to LiipDoctrineCacheBundle.
Fixes #3. Implemented support for cache provider aliasing.
Updated readme with latest modifications
Service parameters
Add service parameters example
Update README.md
Custom providers
Add custom type example
Initial import and some updates to AclCache. Not yet fully finalized.
Do not break the build.
Symfony Bridge Adapter