Mention pandoc
Add pandoc into see also section in ronn.1
Sort see also section by section, then by name

This is suggested in man 7 man-pages in the "See Also" Section.
Merge branch 'sort_see_also' into pandoc

Conflicts:
	man/ronn.1.ronn
Merge pull request #57 from martin-ueding/pandoc

Mention Pandoc