This is project is a test if a web-account plugin for Aperture 3.2 is possible and is not meant to provide a fully working plugin.
Either place the Paul.accountconfigplugin in /Applications/Aperture.app/Contents/Plugins or make this folder writable to your user. The debug build process will place the product in that folder and start Aperture.
This is currently only part 1 of 2 for a plugin (it seems). A web-account plugin is splitted into two parts. First the .accountconfigplugin package and the .publisher package. This code deals with the .accountconfigplugin part only at the moment.
It's called "Paul" for no reason but to give it a name.