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
fix blockquote font color, block title spacing
revisions, rewording, grammar
revisions, use attribute for urls
add link to quick reference from writer's guide
wrap examples in example blocks
fix minor errors
revised intro
update link names
add --fop flag to PDF command
add more entries to who uses AsciiDoc list
add pdf of quick reference, add version to document