Update on Blue Velvet

Blue Velvet has been tested and works succesfully with Blender 2.72b and Ardour 3.5.403.

Even though this is the first time Blue Velvet is tested in a year, this is just a routine update check. There’s no need to reinstall the addon.

With this, all of the Blender Velvets addons have been checked and/or readapted for Blender 2.72b, finishing the updates for this version.