wumpus-core

Copperbox revision 1675.

Work on SVG "delta" output optimization - i.e. attributing a nesting group (g) element with common properties rather than every node 'below' it.

Most of the work for this was done in version 0.30.0, however there was no API interface to actually use of it. Now that I've added the interface, I've found that the output doesn't quite work...