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

OO-291:  add documentation, add more unit tests for RightManager, merge tests of BusinessGroupService...

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-262: make the default value consistent for the flag "is assessable" of the SCORM course building block

OO-213: make OpenOLAT more robust against corrupted course, mark them in details view, make home resistant to corrupted courses, give the possibility to delete them

OO-208: offer to download only the attached file and not a generic Mapper (there is only one file to download)

--HG--
branch : i18n_OO

FXOLAT-437:  don't delete efficiency statements of existent course, delete all UserCourseInfos before deleting the repository entry

--HG--
branch : i18n_OO

OO-204: refactor the DisplayPortraitManager to allow portrait saved in PNG and using the new ImageHelper implementation

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