* Use mocha, chai & sinon from the npm. As of sinon 2.0
sinon-as-promised is no longer required so it is removed
* Tweak code to re-use the same loader with the same environment
throghout the code
* Introduce browserify step for testing tools that only provide
node-compatible libraries (sinon, chai-as-promised)
* Introduce copy step for test data to resolve multiple issues with
tests depending on files not being symlinks
* Re-introduce custom implementation of setTimeout to resolve issues
with few tests
* Re-introduce custom Bluebird Promises config & monkey patch
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