Use digdug tunnel for saucelabs driver
Update job properties in sendJobState
Adjust driver options
Add BrowserStack driver
Rename drivers
Add TestingBot driver
Pass jobState completely
Extract duplication
Add BrowserStack and TestingBot to README
Fix lint errors
Merge pull request #3 from uxebu/use-digdug

Use digdug to connect to SauceLabs, BrowserStack or TestingBot