Fix Mongo Adapter to make it valid.
Change the creation of foreign keys.

Flip the array to be Table Form -> Table To.
Change getTargetHierarchy to match changes in foreign keys array.
Change ZendDb buildQuery to use new foreign key array structure.
Fix accessor for MetaData Fields in HydrationListener.
Merge branch 'master' of git://github.com/zucchi/ZucchiModel