Comment 1 for bug 629150

This is fallout from fixing bug 230903, and also fulfilling the behaviour bug 148030 asks for. But bug 882541 shows it's still causing pain.

I see two possible approaches for resolving this issue:

1) When creating a bound branch, get the explicit or implied remote nick, and set it as the explicit local nick. This means it won't then requery for it each time, at the cost of not detecting if the remote branch's nick changes. It also won't fix the issue for people who've already created bound branches, they'll want to set the nick explictly themselves.

2) In version_info rather than doing `self._branch.nick` do `self._branch._get_nick(local=True)` which has basically the same effect as the above, but leaves the slow nick fetch problem around for other commands. It also may surprise some people by starting to return the name of the local directory rather than whatever the remote branch has as the nickname.