xwiikeymap: add argument parser
xwiikeymap: add argument parser

The keymap and some basic parameters can now be changed on the command line with
arguments to xwiikeymap.

Signed-off-by: David Herrmann <fb53b2ddb8d141e0cb39d7c67c2f81b6bc2eb0f7@googlemail.com>

barracks510/xwiimote,barracks510/xwiimote,dvdhrm/xwiimote,dvdhrm/xwiimote,AdamLuchjenbroers/xwiimote,barracks510/xwiimote,AdamLuchjenbroers/xwiimote,barracks510/xwiimote