Asciidoclet announcement blog post
Asciidoclet announcement revisions

- added standard distribution section
- fixed title (camelcased AsciiDoc)
- added Motivation section title
- split motivation paragraph into multiple paragraphs
- minor wording revisions
- minor formatting adjustments
Merge pull request #1 from mojavelinux/asciidoclet-announce-revisions

Asciidoclet announcement revisions