Fix prepared CQL query not accepting values
Modified CompositeEntityManager to treat each column as an entity
instead of the OneToMany relationsihp between two pojos.  This makes
deleting individual columns much more straightforward.
Fix double onPostLoad call when getting all rows
Merge pull request #360 from elandau/new_composite_mapper

Fix prepared CQL query not accepting values
Update AnnotatedCompositeSerializer.java