Fix CS

Merge pull request FriendsOfSymfony#205 from fritsjanb/master

Allow custom storage service to have its own constructor signature

sync with latest FriendsOfSymfony/oauth2-php

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