Updates for zpm 0.2

I'm preparing a release so here are some small updates to make that happen. When this is merged, we can probably make a zpm 0.2 release tomorrow.
It would be useful to highlight `requests` in this context, to better indicate that we're referring to the `requests` library, and not simply the English noun. At the very least, we could be surround it in double backticks, or even make it hyperlink to the lib page.

The same goes for `python-swiftclient`, just to be consistent.