Fix FriendsOfSymfony#150

Fix travis-ci config

Merge pull request FriendsOfSymfony#99 from pulse00/patch-1

Added note regarding doctrine mappings

Updated README

Update README.md

Fix composer constraints

Added PHP version 5.3.2 to travis-ci

Release 1.1.1

Prepared release 1.1.0

Merge pull request FriendsOfSymfony#18 from mvrhov/clearExpired

Add support for clearing expired tokens and auth codes