Removed extra event classes, made more similar to Commons 2.4
Updated Events to extend commons
Merge remote-tracking branch 'origin/master' into event_class_refactor

Conflicts:
	lib/Doctrine/ODM/PHPCR/UnitOfWork.php
trigger deprecation errors, adjust tests and add TODO comments
Merge pull request #288 from doctrine/event_class_refactor

Event refactoring to use doctrine commons 2.4 events where possible