[Done for V0.36] Additional convert-to properties

[George Gilbert]

FYI - for V0.36, I've split the convert-to property for new objects into use-to, combine-to, expire-to and consume-to.

That means you can now create a chocolate bomb that can have attack methods of its own, you can eat, throw at a monster or wait to explode when the fuse runs out all with different effects.

Whether you'd want to of course, is an entirely different matter

[copperman]

splendid, I always thought CSB could have used a choclate bomb or two