Commit the latest version of AppCafe2. It is now able to perform the standard pbi operations (add/remove/upgrade/downgrade) and is quite robust. The main things missing in the backend still are the XDG operations (pbi_icon, etc..) and enable/disable the autoupdating for applications. In the UI, I still need to add the preferences dialog, as well as tie in to all the customization hooks in the backend.