Weather widget switched to curl.

It is somewhat lighter, faster and simpler than wget. It is as common
as wget these days... from GnuPG to Git and Gimp, they all depend on
it, and we all have it installed.

weather.lua

@@ -22,7 +22,7 @@ function worker(format, station)
     local noaa = "http://weather.noaa.gov/pub/data/observations/metar/decoded/"
 
     -- Get info from a weather station
-    local f = io.popen("wget --timeout=3 -o /dev/null -O - "..noaa..station..".TXT")
+    local f = io.popen("curl --max-time 3 -f -s "..noaa..station..".TXT")
     local ws = f:read("*all")
     f:close()