More metadata tweaks

Here are a few more metadata tweaks. Once you've got those in, I'd recommend you sign up for an account on the [package index](http://pypi.python.org/pypi) and run

```
python setup.py register
```

to grab the name.

Note that this doesn't yet upload the source. To do that, tweak `MANIFEST.in` until the tarball you get from

```
python setup.py sdist
```

actually builds, then run

```
python setup.py sdist register upload
```