Add filters documentation to configuration.rst
Add filters documentation to configuration.rst

mikeSimonson/DoctrineBundle,OskarStark/DoctrineBundle,javiereguiluz/DoctrineBundle,gencer/DoctrineBundle,nicolas-grekas/DoctrineBundle,chrisguitarguy/DoctrineBundle,OskarStark/DoctrineBundle,chrisguitarguy/DoctrineBundle,Soullivaneuh/DoctrineBundle,hason/DoctrineBundle,doctrine/DoctrineBundle,gencer/DoctrineBundle,fervo/DoctrineBundle,fabpot/DoctrineBundle,fervo/DoctrineBundle,skafandri/DoctrineBundle,skafandri/DoctrineBundle,javiereguiluz/DoctrineBundle,mikeSimonson/DoctrineBundle,hason/DoctrineBundle,hacfi/DoctrineBundle,hacfi/DoctrineBundle,dunglas/DoctrineBundle,nicolas-grekas/DoctrineBundle,fabpot/DoctrineBundle,Soullivaneuh/DoctrineBundle