Superposition Sorts
Merge pull request #20 from AurelienHP/master

Fixing decimal separator bug : now GraphViz is forced to use US English ...
Superposition resolu
superposition sorts resolu
Merge branch 'master' of https://github.com/pgroubioinfo/pgrou
Merge pull request #22 from EmnaBenAbdallah/master

Superposition of sorts handled
Debug the way actions are drawn
Update of action while a sort is moved
Merge pull request #23 from ThomasC44/master

Debug action display and move actions while moving a sort
Fixing Move/Export Preferences/Import Preferences bug