hoe-mercurial 1.2.1

This is a fork of the [hoe-hg](https://bitbucket.org/mml/hoe-hg) plugin. I forked it because I use quite a few additional Mercurial tasks for my development workflow than are provided by the original, and I thought they'd possibly be useful to someone else. I've offered to push my changes back up to the original, but I gave up waiting for a response.