flipping docs

So, I've replaced the old, hand-coded* static site with one built with Datenstrom Yellow, a nice little static site generator. This makes it a bit easier for me to add new content. Let me know if anything's broken!

I've also set up a page on OpenCollective so people can donate and see where the money's going. It's just me reimbursing myself, but this way it's easy to publicly keep track of the budget and ongoing costs.

* Even the RSS feed!