wumpus-core-0.9.0

Copperbox revision 949.

I've made a new release of wumpus-core, changing the Boundary class to use the DUnit type family and hiding a function (extractFrame). Methinks the version numbers of wumpus-core are cursed to get very large with the current way I'm developing it as the changes are getting minor, but I like having it compiled to run wumpus-extra against.