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
Fixes to StaleEntityCleapupTest, which is looking good now, also some import cleanups.