Create Admin page on Install

It seems that for an administrative module like this, it would be a bit time-saving to use the built-in API endpoint to create an Admin page for this module and add it to the page automatically. This would also put the feature in the Persona Bar automatically.

This module has already been out there for a while, so this update probably should first check for if the module state is an upgrade or new install before adding the Admin page.

Thoughts?