CP+Michael Zhilin: Added config + GUI for Dev Mode
Refactored the common ThreadListener interface to the WebDriverConfig superclass, reducing the amount of duplicated code in concrete classes
Refactored ChromeDriverConfig to override quitBrowser() instead of threadFinished()
Dev Mode is now available to all web driver instances
Merge branch 'dev-mode'
Merge remote-tracking branch 'upstream/master'
Merge pull request #47 from cplim/master

Including Dev-mode