experiments: add Bitcoin/Litecoin
experiments: link to Gale journal post
style: add some nicer monospace fonts
experiments: HTML cleanup
experiments: SSL links whenever possible

Also drop an <a> that pointed nowhere.
experiments: <del>'d Webfinger

The old host-meta spec allowed me to handle all requests with just a few
static rewrite rules. The new spec requires a CGI script to handle it.
files: add proofs.txt with Bitcoin key signatures