Removed completed tasks on todo
Allowed a master screen to accept button presses to change screens
Improvements to event handlers to prevent comodification of listener 
lists
Added screen interface to force all screens to cleanup
Added title changes depending on the screen
Added missing files to index
Added new text to todo to try and stop Git complaining
Merge branch 'gui_dev' of
https://github.com/gargoyle3333/BotSelector.git into gui_dev