[PATCH 3 of 5] shelve: use an --unshelve parameter instead of a command

[Matt Mackall]

On Thu, 2013-09-19 at 23:34 +0200, Martin Geisler wrote:

> For shelve, I think that shelving and unshelving will occur about
> equally often -- after all, what good is a shelved change if you don't
> eventually unshelve it :)

This is a pretty good argument. I might be swayed.

-- 
Mathematics is the supreme nostalgia of our time.