How to setup php-atompub-server

I am slowly hacking away at my identity faceting service and wanted to play with exposing facet history with atompub. I found Jeroen Hoekx’s php-atompub-server.
This post is how to setup an Atompub server using PHP5. This post assumes you are using (and are familiar with ) Apache2, PHP 5, and Linux. I will be doing [...]