Strip metadata from converted images.

files/scripts/compress_image.sh

@@ -75,7 +75,7 @@ if [[ -n "$in_size" && "$size" != "$in_size" ]]; then
 	usage 1
 fi
 
-convert_exe="`which convert`"
+convert_exe="`which convert` -strip"
 if [[ "$convert_exe" == "" ]]; then
 	echo "ERROR: 'convert' command could not be found, "
 	echo "please install 'imagemagick'."