Migrating the wiki, fleshing out the web site

[Greg DeKoenigsberg]

Tinygames has a miserable web presence right now. I'll be working to
fix that over the next few days, probably before I commit any more
code to the repo. So:

Item #1: get the wiki migrated to Github.

Item #2: put up a barebones presence on tinygames.org, which is a
wasteland right now.

That's all. Lots going on at OSCON, so I'm just checking in.

--g