Switches to a new SauceLabs account and changes to encrypted details
Add in new browser versions plus the beta and dev for both FF and Chrome
Removes FF versions where the build was failing and we're not realistically going to go back and fix
Removes mention of Safari because I don't think we are actually testing that browser
Restores the global key I accidentally deleted
Ruthlessly cull the tested browsers to focus on the common Guardian use-cases
Remove beta and dev builds for the moment, focus on getting CI working
Merge pull request #274 from guardian/rr-saucelabs-ci

CI: updated SauceLabs details
Merge branch 'master' into rr-mandatory-plugins-clarfication