Updating CSS fix to instead include the ":enabled" selector for all AppBarCommand and BackButton "button:hover" rules , in order to be more specific than the generic button:enabled:hover rules defined in the intrinsic controls less file.

This closes #167
This closes #168
This closes #169
Update saucelabs-qunit.js
Update .travis.yml
Fix a sporadic test failure on Safari

Fixes #131
Fixes optionsParser unit tests on Safari. Fixes #126.
Merge branch 'master' into banguero/testsaucelabs-runut

Conflicts:
	tasks/options/saucelabs-qunit.js