Sauce Integration 

Can someone review this, I haven't worked with `karma` before. Tests pass locally, but the sauce component is still untested.

Based the `karma.conf-sauce` file on [angularjs's karma sauce integration](https://github.com/angular/angular.js/blob/master/karma-shared.conf.js)

(BTW Sauce accounts are Jeremy's)
Ah it's Karma specific stuff. More info [here](https://github.com/karma-runner/karma/blob/1b56932fb49e0f3793f00599e11c24f6254236f4/docs/config/01-configuration-file.md#transports).