Adding new base event objects for entity related events
Making EntityEvent vetoable
Removing used of ProjectBundle events, removing event objects
Removing UserBundle specific events in favour of core events
Adding EntityEvent tests
Removing unused use statement
Fixing stupidity in the EntityEventTest (bad namespace and use statement)
Adding test for EntityModifiedEvent
Merge pull request #23 from tickit-project/feature/entity-event-refactor

Refactoring entity specific events in favour of core entity events