updated WFK and EAP BOMS to 6.2.2.GA and 2.6.0-build-1 versions
Update CONTRIBUTING.md

Correcting the fork link for DEVELOPER-410
https://issues.jboss.org/browse/WFK2-613 removed also remaining files in helloworld-errai
https://issues.jboss.org/browse/WFK2-640 Fix bug involving saving of contacts
added Super Dev Mode options into GWT module descriptor and added an appropriate description into README.md file
[WFK2-600] - Contacts Secured with PicketLink.
[WFK2-600] - Update JavaScript design, add comments, add logging statements.
[WFK2-600] - Configure the sign-up registration page in contacts-mobile-picketlink-secured to display an error message when the user name is not unique.
Refactoring packages.
Refactoring packages.
[WFK2-600] - Update the failed log-in error handling to display a message instead of a pop-up in contacts-mobile-picketlink-secured.
[WFK2-600] - Fix Delete without Permissions bug in contacts-mobile-picketlink-secured.
Fixing typo.
[WFK2-600] - Update picketlink/deltaspike dependancies to use red hat productized versions, in contacts-mobile-picketlink-secured.
[WFK2-600] - Add comments to the java security code. Change tabs to spaces.