Strip away copyrighted ICC profiles

While searching for embedded non-free ICC profiles:

	find . -regextype posix-extended -iregex '.*\.(jpg|png)' \
		-exec sh -c 'identify -verbose "$0" \
		| grep -i copyright && echo "$0"' {} \;

The following files showed up. The proposed alternative files just
remove the embedded possibly non-free and anyway useless ICC profiles:

	exiftool -icc_profile"-<=" $files

The images have been checked as identical to their source.
Merge pull request #55 from DavidPrevot/icc-free

Strip away copyrighted ICC profiles