Add binderFromObject:keyPath:toObject:keyPath:formatter: method to create a binder that uses a NSFormatter (like NSDateFormatter or NSNumberFormatter)
Merge pull request #7 from 5sw/master

Binder with NSFormatter
New self-observation test.
Merge remote-tracking branch 'github/master'

Conflicts:
	THObserversAndBindersTests/THObserversAndBindersTests.m
Allow calling of `-stopObserving` inside `-dealloc` to work when observing self.
No longer is is necessary to find an appropriate place to stop observation before deallocation (you still need to do it manually though).
Allow arm64 builds.
Properly cast objc_msgSend calls.
Let Xcode set its LastUpdateVersion tag.