Log Message:
Update ruby-mocha to 1.1.0.

# Release Notes

## 1.1.0

* Set visibility of any instance stub method.
* Stub methods with a prepended method if there are other prepended methods. \ 
Thanks to @mrsimo.
* Improve docs for `Mock#responds_like` & `#responds_like_instance_of`.
* Use GitHub convention for instructions on contributing to Mocha.
* Fix typos in docs. Thanks to @10io