add background removal

usr/bin/satalite-wp-update

@@ -45,7 +45,7 @@ url+="&access_token=$key"
 # process incoming data
 [ ! -d "$outdir" ] && { mkdir -p "$outdir" || error "failed to access '$outdir'!"; }
 curl "$url" -o "$outdir/tmp.png" || error "failed to download from url='$url'!"
-mv -f "$outdir/tmp.png" "$outdir/curr.png"
+convert "$outdir/tmp.png" -alpha set -channel RGBA -fuzz 1% -fill none -floodfill +0+0 white "$outdir/curr.png"
 
 # update the feh background
 . "$HOME/.fehbg"