Create chart block extension
Adds c3.js backend
Adds bar, step and spline c3js chart
Merge pull request #7 from Mogztter/issue-2

Create chart block extension
Allow to cross-compile in js
Merge pull request #19 from Mogztter/cross-compile-js

Allow to cross-compile in js
use unicode charset in tree block macro
'asciidoctor/extensions' is required by asciidoctor-cli
Merge pull request #20 from Mogztter/compile-js-return

'asciidoctor/extensions' is required by asciidoctor-cli
use require_relative to require extension.rb script
Merge pull request #18 from lordofthejars/master

Adds a new inline extension about emoji icons
code review of emoji-inline-macro

- delegate image_uri resolution to helper method
- require allow-uri-read attribute to embed remote URI
- set default macro name (:emoji)
- rename sample file to sample.adoc
- honor the htmlsyntax setting
- formatting
use require_relative to require extensions.rb script
code review for steps-postprocessor

- remove duplicate backend check
- simplify regex replacement
- rename sample file to sample.adoc
- remove asciidoctor import