`profanity mangen` will create for each command (`/account`, `/roster`)
an own manpage (`profanity-account.1`, `profanity-roster.1`)
See https://github.com/profanity-im/profanity/issues/1444
Needs some polishing formatting wise.
Now, `make dist` can be used for generating tarballs. It simplifies
making proper release tarballs. Also, it includes some files, that
are removed in RELEASE_GUIDE.md:
- apidocs/
- CHANGELOG
- theme_template
It is a good idea to include such a kind of documentation.
Update RELEASE_GUIDE.md.