Make deb

The deb file included was intriguing to me, but I saw it hadn't been updated in a while. I found out that dpkg-deb can make "quick and dirty" debs like this one, so I put together a script to build something like the existing deb file on the fly, using git-describe for versioning, etc.

If you merge this, you might want to adjust the `control` file so that it refers to your branch, not mine.