For some unknown reason phantomjs is now happy to be launched from the PATH. So removed my previous comment.
Added a configuration mechanisms through which the user can decide precisely in which browsers he wants the unit tests to run.
Created a package to hold all browser specific implementations
Added DesktopDefaultBrowser
unit tests now print their execution result in the logging div again
phantomjs now works again
Added ChromeBrowser and FirefoxBrowser, both based on the new AbstractBrowser class
Merge remote-tracking branch 'npiguet-test-helper/master'

Conflicts:
	test-helper/src/main/java/org/stjs/testing/driver/JUnitSession.java
implementation of the remote browser (still needs improvement)
add rhino browser in the test helper