Removed the numpad constants pending re-evaluation of how to handle those.
Added the scancode->KeyEvent.Key mapping table.
Updated the GTK+ implementation and test programs to reflect the new KeyEvent setup.
Added numeric keypad question to Area planning document; also reformatted it a bit.
Added the proper provision for numeric keypad entry.
Re-added the numeric keypad keys to ExtKey and removed predefkeys in area_unix.go since all are now being handled.
Finished re-adding the numeric keypad keys and fixing up the GTK+ Area implementation to handle the new KeyEvent. Everything seems to work on this end...
More TODOs.