Evaluate integration of Saucelabs in order to test cross-browser compatibility on commit

[evilaliv3]

It would be valuable to integrate with Saucelabs in order to test cross-browser compatibility tests on commit.

As the library is using karma as testing framework my suggestion is to start implemeting them using karma-sauce-launcher.

This way it will be possiblle to automatically execute all the unit test on the selection of browsers targetted by the library (all) and know proactively where it is not working.

E.g.: https://github.com/globaleaks/GlobaLeaks

It would be also nice to start tracking the code quality of the project using for example CodeClimate and tracking also the code coverage by means of Coveralls + karma-coveralls

I've implemented the exact integration you need here:
https://github.com/flowjs/flow.js/blob/master/karma.conf.js

An example of the output with all integrated is the following: https://github.com/globaleaks/GlobaLeaks

[lgalfaso]

PRs are welcome.

[evilaliv3]

I know @lgalfaso thanks :) in the meantime i've annotated it if there is someone interested; i will try to do it in the spare time if we confirm that the component is needed for GlobaLeaks.

could you please give me an answer on: #93