update booking logo

git-svn-id: svn://svn.mongueurs.net/yn2014@81 89e87127-a2d7-e211-820f-0014221438fa
Grant Street Group is now a sponsor (again!)

git-svn-id: svn://svn.mongueurs.net/yn2014@82 89e87127-a2d7-e211-820f-0014221438fa