Theme Admin Section

I think a few things should be changed to be able to do theme changing. Well, for one thing... move the themes stuff to its own admin section, then make a link to a sub-section of that section that allows editing of the theme files themselves (As IPB and eXtreme Styles for phpBB allows.) Of course you'll need to make the gallery ask for the admin/FTP password to do this.

This way, we can update skins/templates easily.