Add new browsers to remote test suite

Browser list taken from:
http://gs.statcounter.com/#browser_version_partially_combined-ww-monthly-201301-201301-bar
For travis builds, only run remote tests once
Use TRAVIS_BUILD_NUMBER instead of Job Id

It should give cleaner reports in SauceLabs
Change sauceLabs account

Account credentials are not public anymore
Fix timeout on sauceLabs tests

Start browsers one by one instead of all at the same time
Make remote timeouts fail the build