Finished EntityVersionCreatedTask and added tests to prove that the issue is fixed.
Pruning old code and reformatting
Added an extra test to check that multiple listeners function correctly.
Merge branch 'pr/92' into two-dot-o-events.  This closes #92

Conflicts:
	stack/core/src/test/java/org/apache/usergrid/corepersistence/StaleIndexCleanupTest.java