Blender Git Loki

Finished porting etch-a-ton to 2.5

Changes: Gestures are now Shift-ActionMouse (doing it with SelectMouse required a bit of juggling and triggered a display glitch that I'll try to debug later)

Everything else should be as functional as in trunk, apart from the dotted rubber band line which doesn't update while the view is rotated and only the current area getting redrawn while drawing (the later should be easy to fix).