resolves #28 create asciidoc vs asciidoctor page

- added link to docs index page
- sorted differences into categories
- added next steps section
resolves #93 remove asciidoc vs asciidoctor section
resolves #57 update table syntax in quick and writers docs

- added table example with column titles on single line to quick ref
- added table example with cols and repeat operator to quick ref
- clarified column relative width in quick ref
- added repeat operator definition to writers guide
- updated cols value syntax in quick and writers ref tables
Merge pull request #92 from graphitefriction/asciidoc-vs-asciidoctor

resolves #28 create asciidoc vs asciidoctor page
rename/retitle page cataloging Asciidoctor and AsciiDoc differences
Merge pull request #94 from graphitefriction/remove-diff

resolves #93 remove asciidoc vs asciidoctor section
Merge pull request #98 from graphitefriction/table-example-quick

resolves #57 update table syntax in quick and writers docs
update table syntax notes
upgrade to Asciidoctor 0.1.4.rc.1
fix breakage of result toggle in syntax quick reference
change title of AsciiDoc / Asciidoctor differences page
prepare for Asciidoctor 0.1.4 upgrade
Merge pull request #99 from mojavelinux/0-1-4-upgrade

prepare for Asciidoctor 0.1.4 upgrade
switch to non-broken Awestruct branch