Chug

[Tuomas Lukka <lukka@xxxxxxxxxxx>]

While preparing for the presentations here at Lapinjärvi I've finally
actually gotten to edit any major structure in ZZ. It's pretty nice to use
now, except for a single great lack: chug. Just about every other
conceivable operation is easy.

So Ted, could you please give a spec, even for the non-multicell
operation; Which keys chug, and how to do one or both directions?

	Tuomas