Release 1.6.0
Merge branch 'master' into geezer
Update to version 1.7.0-pre

[ci skip]
Merge branch 'master' into geezer
Roll back wd to 0.2.2

The `waitForElementX` methods in wd 0.2.11 return an element (and
therefore set the context) which can break existing functional tests.
Merge branch 'master' into geezer
Update sauce-connect-launcher to 0.4.0

sauce-connect-launcher 0.4.0 uses Sauce Connect 4.1, which includes
new Sauce Labs SSL certificates.

resolves #175, #176
Merge branch 'master' into geezer
Improve error reporting of proxy message duplicates
Fix proxy tries to read directories as files
Fix error messages are being double-logged
Fix setHeartbeatInterval is not chainable
Fix uncaught exceptions in runner being silently discarded
Fix config files being loaded from the wrong location
Style convention fix
Merge branch 'master' into geezer
Don't show coverage report when there's no data

Fixes #127
Merge branch 'master' into geezer
Provide real error messaging for functional test failures

Fixes #178.
Merge branch 'master' into geezer