Update AsciiDoctor.
Amend font and add logo to the AsciiDoctor guide.
AsciiDoc suggestions

- put logo in document title
- use blank lines between chapter includes
Restructured to upload to Bintray and oss.jfrog.org. Updated asciidoctor build to latest plugins, added PDF.
Updated gitignore and removed acidential IDEA file
Merge pull request #10 from ysb33r/master

Bintray & Asciidoctor related changes plus some tidying up.
Merge pull request #9 from mojavelinux/asciidoc-suggestions

AsciiDoc suggestions
Add Snap-CI build status.