Added the option so the end-user has the option to click a button or link indicating "That's not me!" -- telling CAS to log out and re-start the login flow giving them the opportunity to log in, first using username and password, as themselves.
Removed the redirection from the SWF level, and switched to JS instead to handle the redirect.

This allows us the ability to entirely start a new flow session.
Added comments in the webflow on how the cancel event is handled.
Merge branch 'master' into RESET-2NDFACTOR-FLOW

Conflicts:
	webapp-overlay-example/src/main/webapp/WEB-INF/classes/messages_en.properties
Merge pull request #33 from Unicon/RESET-2NDFACTOR-FLOW

Control on additional authentication factor prompt