Added NS_REQUIRES_NIL_TERMINATION for `only` and `except` functions.
Added NS_REQUIRES_NIL_TERMINATION for `only` and `except` functions.

We will get EXC_BAD_ACCESS without a nil termination.
AlexDenisov/iActiveRecord,AlexDenisov/iActiveRecord,AlexDenisov/iActiveRecord,3dcl/iActiveRecord,valerius/VinylRecord,3dcl/iActiveRecord,valerius/VinylRecord,3dcl/iActiveRecord,valerius/VinylRecord,valerius/VinylRecord,3dcl/iActiveRecord