Merge pull request #17 from solispauwels/master

fixes claroline/claroline#390
Add feature for a widget which display the last 3 messages from Forums of the user's workspaces
Widget not configurable and name error
Changes after code review
Merge pull request #18 from sleperf/master

Forum widget
Forum Update.
Merge branch 'master' of https://github.com/claroline/ForumBundle
Fixing merge.
Translations & breadcrumbs.
Adding "sticky" feature.
Moving templates & removing forum options.
events + docblocks.
Pagination.
Fixing search request.
Request optimization.
Fixing the category listing.
Merge pull request #19 from claroline/update

Add forum categories
Removing datafixtures.
Removing datafixtures.
resquest scope to request stack