Update System for JoostBook
I added a update system for the JoostBook plugin. If you download the current version of JoostBook, when a new version gets released, a message will appear below the navigation indicating that you should visit the JoostBook site and download the plugin again.
There is a slight twist to updating plugins with the current version of the Joost beta, you will have to un-install the existing plugin, and re-install the new plugin you have just downloaded. You won't lose your history or anything. Eventually there will probably be a way to set a version and an update URL in the install.xml, or your main file, but for now I just fire off an XHR to check the version on the server against the version downloaded.