Merge pull request #2 from seb777/master

Displays and actives a resizeable border around the configuration frame.
Moving from GPL2 to GPL3.
Merge branch 'master' of github.com:j-jorge/bear
Clean up and bug fixes in the slopes.

Remove the threshold used to cancel the move of an item.

Do not give any force when the movement is lower than the friction.
Code clean up and little hack in the slopes.

The items put on the slopes tend to gain speed due to the collision repair
event if they don't move. If their movement is lower than one unit, we do
not apply the collision repair.
Merge remote-tracking branch 'upstream/master' into editors-fix
Correction du mouvement join
Merge remote-tracking branch 'upstream/master' into editors-fix
Le fichier de config peut contenir plusieurs workspaces.
Attention : il faut ajouter [default] en tête du fichier "config"
Retrait d'affichage
Possibilité d'éditer les workspaces
Merge remote-tracking branch 'upstream/master' into editors-fix
code clean up