Running CI browser tests on SauceLabs

I integrated TravisCI with Sauce Labs so all jasmine browsers tests are run with multiple browsers in the cloud. Had to upgrade jasmine to current stable 1.3.1 as grunt-saucelabs does not work too good with 1.2.0. Added a badge showing status of the browser tests.

It would be better to create a new Sauce Labs user for the project - but I'm not sure who should be in control of the account. I can create account, alter the codebase and hand credentials to the right person.