OO-291: redefine the membership concept, break the synchronization between group and repository members

OO-291:  enhance the main search function for groups, add search in waiting list, add search of public group, add unit tests

OO-291: first step: move business gourp manager to a business group service, remove dependency to the context...

OO-280: build the infrastructure for Selenium 2, Arquillian and a managed Tomcat 7.0, remove old selenium 1 tests, remove profile of Firefox...

OO-278 fix wrong default value for debug mode and check if source path really exists when setting to prevent followup errors.

no-jira: remove duplicate definition in spring configurations, remove unused Dispatcher configuration (duplicaed too)

OO-203: refactor the ImageHelper to use different implementation, add an implementation based on ImageMagick/GhostScript for pictures and PDFs thumbnailing

FXOLAT-426 : remove LDAPAdminExtension class, add genericActionExtension (for SysAdminController) in ldapContext.xml. (according to the other modules)