Finished implementing curses_list_{up,down,sel}.
Improved handling of colors in curses.{c,h}.
Factorised list line drawing code.
Added test of curses_list_{right,left}.
Added code to test the command line of the interface.
Added code to draw the command line.
Program now quits on 'quit' command.
Fixed problems in command line drawing.
Improved command line interactivity.
Implemented backspace action in command line.