added browser testing with sauce labs + travis
added downloaidng of dev db to travis for browser tests
Merge branch '266-error-when-first-running-migration' into browser-testing-with-sauce-labs
added creation of test superuser for the browser tests
uncommented the normal tests in travis (was commented out before for testing)
added some documentation for the browser tests
added some comments
change browser_test* to browser_cases* - otherwise it interferes with nose test runner
skip the test suite if no sauce username/accesskey
Merge pull request #269 from OriHoch/browser-testing-with-sauce-labs

Added support for browser testing