DataEvent was deprecated in symfony 2.1 and removed in 2.3, using FormEvent instead
Add development dependencies in order to run tests
Add contributing section
Adjusting Symfony requirements.
Merge branch 'cabello-dataEventDeprecated' into 2.dev
Upping symfony requirement.

Adding PHPunit config
Merge branch '2.dev' of github.com:rdohms/dms-filter-bundle into 2.dev

Conflicts:
	Tests/Form/EventListener/DelegatingFilterListenerTest.php