Run unit tests on Sauce

Unit tests are now run on Sauce in:

* Chrome
* Firefox
* iOS 7.1
* Android 4.3
* IE 11
* IE 9

Confirmed, 196 tests passing on my own Sauce account. :confetti_ball: Tests fail on IE 8 (didn't investigate why) and I figured there wouldn't be bugs in IE 10 that weren't in 9. 

I held off on spending time on Protractor since I don't think it's entirely necessary. I think that time would be better served increasing unit coverage.