Move RACSubscriber class to a private header
Deprecate -rac_didDeallocSignal
Deprecate -rac_addDeallocDisposable:
Refactor callers to use -rac_deallocDisposable instead
Merge pull request #585 from ReactiveCocoa/remove-did-dealloc-signal

Deprecate -rac_didDeallocSignal
Merge pull request #586 from ReactiveCocoa/deprecate-add-dealloc-disposable

Deprecate -rac_addDeallocDisposable:
Merge pull request #584 from ReactiveCocoa/remove-racsubscriber

Move RACSubscriber class to a private header
Merge branch '2.0-development' into interval-scheduler