Adding model for workgroups
Fix #1421: Big refactorisation to make easy the integration of the Ribbon Menu
Activating ribbon
Deplacing access to favorites to ribbon menu
Fix #1424: Fixing occasional bug when deleting obsolete data
Adding groups list to ribbon
Displaying informations tab about groups
Correcting a compatibility bug
Adding projects tab to group view
Checking if avatar file exists before trying to load the file in cache
Adding members tab to group view (without avatar loading)
Displaying a standard avatar icon if avatar image cannot be loaded
(instead of standard project image)
Loading avatar images in group view asynchronously
Refactoring GroupsListImageHandler and ProjectsListImageHandler to
ListImageHandler
Recreating menu when ribbon item changes to Projects
Fixing bug if screens rotates on homepage
Don't try to updates fragments if activity is stopped
Adding black background for list layout in landscape too
Inflating user grid manually with the black theme
Calling setHasOptionMenu on every fragment as a workaround to update the
menu on every fragment before refactoring menus