Fixing and lifting 'Yellowpages' app

Changing yellowPages EJB from stateful to stateless and removing some useless code
Despite Yohann's fixes, management of contacts was always buggy
So, at this occasion, code relative of contacts management have been totally modified :
- no more popups
- no more tabs
- code have moved from JSP to RequestRouter
- obsolete JSP files have been removed

Now, this app is much more maintainable and user friendly...