Chore: Get full Functional Test env/browser matrix support.

[ryan-roemer]

Here's the wide sampling of things we want to support.

• [ ] Local (Mac)
  • [x] Chrome
  • [x] Firefox (Failed on 21.0, Passed on 35.0, 40.0.3)
  • [ ] PhantomJS (#34 - Phantom fails)
  • [ ] Safari (Uncaught Error: com.google.gson.JsonObject cannot be cast to java.lang.String)
• [ ] Local (Windows)
  • [ ] PhantomJS (#34 - Phantom fails)
  • [ ] Firefox
  • [ ] Chrome
  • [ ] IE
• [ ] Travis
  • [ ] PhantomJS (#34 - Phantom fails)
  • [x] Firefox
• [ ] Appveyor (#36 - Appveyor browsers fail)
  • [ ] PhantomJS (#34 - Phantom fails)
  • [ ] IE
  • [ ] Chrome
  • [ ] Firefox
• [ ] Sauce Labs
  • [ ] A broad sampling of os/browsers

Going with default of local.firefox for now for common case for Mac devs.