Use yelp-tools instead of mate-doc-utils
Fix typo in configure.ac
Merge pull request #31 from infirit/yelptools

Use yelp-tools instead of mate-doc-utils
shell: Use yelp documentation instead of static html
Add check for zlib and add to linker

Should solve https://bugs.gentoo.org/show_bug.cgi?id=480464 and
https://github.com/Sabayon/mate-overlay/issues/46