Add note about additional backwards compatibility break: - HCTestFailureHandler has changed from a protocol to a class.
Add note about additional backwards compatibility break:
- HCTestFailureHandler has changed from a protocol to a class.

hamcrest/OCHamcrest,hamcrest/OCHamcrest,hamcrest/OCHamcrest,klundberg/OCHamcrest,klundberg/OCHamcrest