Asserting that an entity has a MOC
Merge pull request #232 from notjosh/patch-1

Asserting that an entity has a MOC
Revert "Merge pull request #232 from notjosh/patch-1"

Reverts my premature merge in #232 :sweat:
Added assertion for faulted managed objects without a MOC
Added test for NSManagedObject->MTLModel for MOs without MOC