Upgrade Saucelabs, move browser specs to external file,
Update tests to support latest Saucelabs
Externalize sauce variables
Bump jquery versions
Update SauceLabs settings

- Add session name with timestamp to aid in debugging in UI
- Add appropriate ET browser list into YAML file (like BS3)
- Add username and key to un-versioned file
- Update jquery / bower versions
- Arranged order of SauceLab browser tests (this appears to be an art, not a science)
Set test task
Change to saucelabs
Bump node version for Travis.yml
Remove jquery 1.11 test to reduce length of saucelabs tests
Revert to having jquery 1.11 in tests
Remove testem.json
Merge pull request #458 from ExactTarget/update-saucelabs

Update saucelabs