(selenium tests) fix enemy #1 - turn two distinct transactions into a signle transaction to fix StaleElementErrors seen during ChangePassword tests /cc @klrmn @zac @6a68

A script to run tests against saucelabs (w/ contributions from Leah [:klrmn] Klearman and Zach [:zcarter] Carter)

4c10bb2 Merge pull request #42 from zacc/add_is_this_your_computer
a490f28 Add methods and test for 'is this your computer'

git-subtree-dir: automation-tests/browserid
git-subtree-split: 4c10bb2b2c46b6b56d224f52945b55c4e1c256f1

avoiding them in two ways,
* -m travis
* skip if mozwebqa.email == None

also, longer timeouts

    TODO: probably should do another pass at reorganizing the README file.

  We'll add bidpom as a git-subtree as a next step