wumpus-basic

Copperbox revision 1546.

Initial work on line-line and line-plane intersection.

This is needed for radial anchors on polygons, and radial anchors on polygons are needed for decent tree drawing and "blob" diagrams i.e. graph diagrams where the node is some graphic.

I haven't got a good formulation of line-plane intersection which is a problem as thats the one I really need. Currently I'm generating a line representing the plane but there's a bug in my method and I'm doing it wrong.