Accessible (?) PDF and small updates

There’s two main things to this update.

First off, there’s a whole bunch of revisions/expansions to the text. The main one is that the pointcrawl links are now described.

Secondly, there’s a new PDF in the download that should be screenreader accessible. We’d love to hear from folks trying this out as it’s a product of a new workflow that likely has some bugs in it.