modified WebDriverFacade
- do only quit() if closeAndQuit() - close is not needed before quit
and it screws up the ChromeDriver
- consequently fixed http://java.net/jira/browse/THUCYDIDES-146
- on close() if there is only one Window handle -> that's a quit.
corrected the test case to reflect the closeAndQuit() change
Merge pull request #80 from alex-okrushko/master

modified WebDriverFacade. Fix THUCYDIDES-146