Added a command for cleaning up expired tokens.
Merge pull request #18 from RobinvdVleuten/patch-4

Added a command for cleaning up expired tokens
Created base classes for all models and created consistent class name like FOSOAuthServerBundle.
Merge branch 'master' of https://github.com/willdurand/BazingaOAuthServerBundle into patch-5
Removed all setters from model classes.
Merge pull request #19 from RobinvdVleuten/patch-5

Created base classes + consistent class name with FOS's bundle