chore: remove jstd leftovers
chore: update karma to 0.9.4

And also add shared config to make karma configs a bit simpler.
chore: clean up angularFiles.js
chore: set up Sauce Labs with Travis

This should not affect the Jenkins build at all.

Now, the Travis build uses Chrome on Sauce Labs, which in theory gives us opportunity to use any
browser/platform that Sauce Labs offers.