[lcd4linux] added support for keypad with Curses display

[C. M. <cm...@fr...>]

Hello,

I have committed to CVS some changes to the keypad direction
naming definitions because these conflicted with the Curses
library definitions.  The Curses display driver now supports
keypad operation using the keyboard arrow keys up, down,
left, and right.

Have fun,

-- 
Chris Maj
Pronunciation Guide: Maj == May