swallow-window.el for now; it's too much effort to maintain the
docs both here and in my elisp file. I'll get around to it.
Alternatively, check the
features/swallow-window.feature; that explains
the plans. Run the tests to see what actually works so far.
Real Docs Coming Soon(tm).
Install Cask; it makes life better.
Then just run
cask install && make.