Add `install`, `uninstall`, and `info`.
Add `install`, `uninstall`, and `info`.

`install` and `uninstall` require `_install` and `_uninstall` methods in
'orphan' files. 'info' assignment uses the same `desc` method as
function documentation, but assuming that the name assigned with `desc`
matches the name of the file.

alphabetum/orphans