Add longer lived adapters
Merge branch '2.0-development' into longer-lived-adapters
WS
Use id as return value for models
Add -filterPropertyKeys:forModel:
Bump Deployment Target to 10.8/6.0
Cache transformers and mappings in MTLJSONAdapter
Don't advertise private methods
Cache whole adapters instead
Rename to serializablePropertyKeys:forModel:
Serialize class clusters correctly
and back!
WS
Restore valueTransformersForModelClass: declaration
Handle transformer lookup in class methods
Make NSURLEntityAttributeTransformer a class method
Use @synchronized instead of GCD
Improve docs for -serializablePropertyKeys:forModel:
Revert "Bump Deployment Target to 10.8/6.0"

This reverts commit 19981517ea3531aeefbde95e4271ff0274acaeaf.
Fix spec wording