[Mantle] Added uniquing via managedObjectUniquingPredicate. Also added foundation code for an NSValueTransformer for mantle to managed objects via relationshipModelTransformerForKey
Merge remote-tracking branch 'upstream/master'
[Mantle/remind101] Added reverse transformations via relationshipModelTransformerForKey: so managed object relationships can be properly reverse transformed back to MTLModel objects via NSValueTransformer.
[Mantle/remind101] Deleted a commment
[Mantle/remind101] Added some performBlockAndWaits for concurrnecy.
[Mantle/remind101] Added block return type. Added error checking when using uniquing predicate.
[Mantle/remind101] Error correction on the error correction on the uniqing predicate results.
[Mantle/remind101] Corrected spelling errors in documentation comment.
[Mantle/remind101] Got rid of relationshipModelTransformerForKey:
[Mantle/remind101] Adjusted for style guide.
[Mantle/remind101] More style adjustments.
[Mantle/remind101] Replaced - (NSPredicate *)managedObjectUniquingPredicate with + (NSArray *)propertyKeysForManagedObjectUniquing for cleaner uniquing implementation.
[r101-ios-teacher] wrap at 80 characters.
[Mantle/remind101] Changed propertyKeysForManagedObjectUniquing to using NSSet rather than NSArray.
[Mantle/remind101] Lots of code cleanup for managed object adaptor uniquing
Merge pull request #1 from github/master

Sync Mantle to f4d6840570
Remove useless InfoPlist.strings files
Merge pull request #123 from akashivskyy/remove-lprojs

Remove useless InfoPlist.strings files
Adding null support to array transformers
No longer test for exceptions when parsing NSNull