Log Message:
Update ruby-mocha to 0.13.1.

## 0.13.1
* Fix #97 - `Mocha::ParameterMatchers#has_entry` does not work with an Array as \ 
the entry's value. Thanks to @ngokli.
* Allow deprecation `:debug` mode to be switched on from `MOCHA_OPTIONS` \ 
environment variable.

## 0.13.0
* Major overhaul of MiniTest & Test::Unit integration. Mocha now integrates \ 
with later versions of the two test libraries using documented hooks rather than \ 
monkey-patching. This should mean that Mocha will integrate with new versions of \ 
either library without the need to release a new version of Mocha each time, \ 
which was clearly bad and unsustainable. Many thanks to @tenderlove, @zenspider \ 
& @kou for their help, suggestions & patience.
* Temporarily deprecated `require 'mocha'`. Use `require 'mocha/setup'` instead. \ 
The plan is that eventually `require 'mocha'` will *not* automatically integrate \ 
with either of the two test libraries as it does at the moment, and you'll need \ 
to explicitly & separately trigger the integration. I think this will \ 
provide a lot more flexibility and will hopefully do away with the need for the \ 
`require: false` option in the `Gemfile` which has always confused people.
* Deprecated `require 'mocha_standalone'` and `require 'mocha/standalone'`. Use \ 
`require 'mocha/api` instead.
* Although these are not part of Mocha's public API, I thought I should mention \ 
that the MiniTest and Test::Unit assertion counter classes have been combined \ 
into a single class `Mocha::Integration::AssertionCounter`.
* Extracted Mocha::Hooks module from Mocha::API and added documentation for test \ 
library authors.
* Improvements to documentation. Much of it has been combined into the README file.
* Fix #101 - Mock#respond_to? doesn't work with a string argument - thanks to \ 
@urbanautomaton.
* Fix #105 - Travis link in README - thanks to @cknadler.
* Various improvements to automated testing of integration with test libraries.
* Make deprecation warnings more prominent.

= 0.12.7
* Officially support minitest v4.1.0 (still monkey-patching).

= 0.12.6
* Fixes #103.

= 0.12.5
* Officially support minitest v3.5.0 (still monkey-patching).