refactor Test the production version

For more realistic results it's important to test the production version
of Aria Templates instead of the source code.
This makes sure that what's built and shipped is working properly and is a
necessity for classes that are generated or modified at build time
feat # Sinon test class

Wrap Sinon.js into a sinon test class that gives the possibility to create
mocks, spies and stubs inside a sinon sandbox

Close #