updated doc with content from news post
Update asciidoc-returns-to-github.adoc

Fixed broken rubygem link and typo.
List plugins now available, minor edits
Merge pull request #1 from mojavelinux/patch-1

List plugins now available, minor edits
Update what-is-asciidoctor.adoc
Merge pull request #10 from graphitefriction/edit-what-is-asciidoctor

Updated what is asciidoctor document with content from news post
Remove section title above preamble
properly detect pull request in travis rake task
Merge pull request #11 from mojavelinux/travis-task-fix

fix travis task