[WIP] Add cache driver to blog manager.
Remove php 5.3.3 from travis test.
Added some todo.
Cache: complete CacheDriverImpl
Cache: update config, config to set em to use for generating ems
Merge pull request #16 from luiges90/cache-driver

Cache driver: Get cache driver implementation from doctrine.orm config
Cache: change namespace
Merge pull request #17 from luiges90/cache-driver

Cache: change namespace
Rename configuration.
Comma bug fix.
Refactor the getEntityManagerConfiguration method.
Need to append root_dir and environment to namespace.
Merge pull request #18 from kayue/cache-driver

Support cache driver in blog entity manager.