Changed xu_menu API to allow multiple admin sidebar menus for better organization.

Changed Plugin system to use standard file names, main.(php|xml) for the setup/info files instead of using the plugin name. 

Added New admin menu shortcut feature, you can now save any page in the admin panel as a shortcut in your sidebar!

Fixed featured file flag on uploading files.

Added tagging to files, expect a visual refresh in the near future.

Unified the file Editing widget in userspace

Added admin panel login logger, now logs IP address and username of all admin logins.

Fixed a few unreported bugs 

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