added established content to user manual

- what is Asciidoctor
- Asciidoctor benefits
- what is AsciiDoc
- text editor
- installation instructions
- license
- authors
- ruby API and command line usage
- text formatting instructions and styles
- example block
- sidebar block
- comment block
- page break
- q and a block
- open block
- passthrough block
- optional delimiter section
- glossary
- ordered and unorder list basics
- labeled list
- hybrid list
- stylesheet factory section
- custom stylesheet section
- render to PDF
- render to DocBook 45
- render to deckjs
- intro to slideshows
- table column and cell sections
- substitutions and replacements
- removed old comments
- cleaned up links and link references
- fixed url summary table formatting
Merge pull request #112 from graphitefriction/guide-compiling

added established content to user manual
upgrade to Awestruct 0.5.4, fix post template
resolves #105 update user manual section about ToC

- added toc-position
- added code examples for each attribute
- updated appendix A with ToC changes
- added images of example results
- removed manual value
- added left and right values
- unset figure-caption in header
Merge pull request #113 from graphitefriction/toc-syntax-update

resolves #105 update user manual section about ToC
resolves #115 updated table styles

- monospaced first column
- centered second, third and fourth and replaced X with checkmark
- cleaned up some comments in fifth column
Merge pull request #116 from graphitefriction/appendix-style-upgrade

resolves #115 updated table styles
Merge pull request #114

Introducing Asciidoctor.js live preview blog post
update post title, date and tags attribute; minor revisions
fix missing callouts in user manual
use xml-friendly callout
Set publish date of post news/introducing-asciidoctor-js-live-preview.adoc [ci skip]
added preamble example

- fixed preamble section ID so toc link works
- added preamble.png image
- resolves https://github.com/asciidoctor/asciidoctor-documentation/issues/17
new content and examples for column specifier section

- added general table content and examples
- added specifier descriptions and examples
- applies to issue https://github.com/asciidoctor/asciidoctor-documentation/issues/23
Merge pull request #117 from graphitefriction/preamble-example

added preamble example
Merge pull request #118 from graphitefriction/table-attr-additions

new content and examples for column specifier section
expanded table section of user manual

- added content and examples to cell specifier section
- expanded and formatted table summary section
- applies to issue https://github.com/asciidoctor/asciidoctor-documentation/issues/23
Merge pull request #119 from graphitefriction/table-attr-additions

expanded table section of user manual
expanded data format and table format sections

- provided additional data format examples
- added a tracks.csv file so the include:: directive works
- added column width specifier examples
- add section on table width and frame
- added footer section
- rearranged sub-section order
- minor copyedits to text and examples
- resolves issue https://github.com/asciidoctor/asciidoctor-documentation/issues/23
Merge pull request #120 from graphitefriction/table-attr-additions

expanded data format and table format sections