wumpus

Copperbox revision 2562.

I've removed the PathAlgs code from Wumpus.Basic.Geometry. Having another Path type here was not really merited as it proliferated the number of Path-like objects. I've updated some of Wumpus-Drawing to accommodate this, but at least the shapes are currently broken. Also I've discovered a bug with localPen in the PathBuilder module that's been around a while.