Made SimpleMode the default window loaded. Hooked it up to the preloader. Made the number of buttons adjust dynamically to the number of files loaded. Hooked up ActionListeners to each button that will eventually open up a gradebook for course selected (trying to understand what we're using for that).
Merge pull request #49 from GarbageElitist/gui_refactor

Made SimpleMode the default window loaded. Hooked it up to the preloader...