deps: add mocha-cloud
test: [saucelabs] add auth placeholder
support: add mocha cloud runner, client, and html test page
browser: build
Merge branch 'master' into feature/saucelabs

* master:
  Fix issue #137, test message existence by using message!=null rather than using message
  Fixed backwards negation messages.
Merge branch 'feature/saucelabs'

* feature/saucelabs:
  browser: build
  support: add mocha cloud runner, client, and html test page
  test: [saucelabs] add auth placeholder
  deps: add mocha-cloud