wumpus-basic

Copperbox revision 2243.

First work re-instating affine operations. It looks like I will need two type classes for each operation (scale, rotate...) one for contextual types that know the current font size (e.g Image, LocImage) and a non-contextual one for Points, Vectors etc. that passes in font size as an extra parameter so units can be interpreted explicitly.

This is obviously not ideal...