TODO :

Initialise and use remaining fields and buttons
Format number output according to buttons
Generate array type according to buttons
Find out how to make it run on Windows (even if it means ditching Glade file!)
Wrap file handling code in try, catch, finally to make it safe
One more tab for program config?
Give debug option an option in there or somewhere
Beautify the GUI? (Rob?)
Make cut, copy, paste, delete work with key commands and menu

