Previously, we didn't have control of byuu.org and it wasn't obvious what we
should do about hosting. Now we can update byuu.org, though, we should continue
using it as the authoritative source information.
Fixes#2.
Added LICENSE.txt and GPLv3.txt. Also updated libco documentation.
After discussion with byuu, libco gets a more specific ISC license
to match nall, ruby and hiro. higan, as clarified in LICENSE.txt,
continues to be GPL version 3 only (no "or later" clause).