[Xastir] Have created addtional .xbm's

[Richard Polivka, N6NKO]

Curt,

I have created additional .xbm's for WX warnings. I have three - heat 
(HEAT), svr_tstrm (SVRTSM) , and wind_chill (?). Heat would be red, 
svr_tstrm in red and I would put wind_chill in red.

I can send them to you under separate cover. I will try and generate the 
appropriate code in map_shp.c and go from there.

73 from 807,

Richard, N6NKO