anchor.diff:    * added support for checklists in unordered list (#200)
     * added DocBook 5 backend (#411)
     * added docinfo option for footer (#486)
  -  * added pygments as source highlighter option (#538)
  +  * added Pygments as source highlighter option (pygments) (#538)
     * added icon inline macro (#529)
     * recognize implicit table header row (#387)
     * uri can be used in inline image (#470)
  
positive.code:   * added new XML-based callouts to AsciiDoc compatibility file
    * added absolute and uri image target matching to AsciiDoc compatibility file
    * removed linkcss in AsciiDoc compatibility file
  
  Bug Fixes::
  
    * lowercase attribute names passed to API (#508)
    * numbered can still be toggled even when enabled in API (#393)
    * allow JRuby Map as attributes (#396)
    * handle callout marks properly when using CodeRay (#534)
    * correctly calculate line length in Ruby 1.8 (#167)
    * write to specified outfile even when input is stdin (#500)
    * only split quote attribution on first comma in Markdown blockquotes (#389)
    * don't attempt to print render times when doc is not rendered
  
  Improvements::
  
    * upgraded Font Awesome to 3.2.1 (#451)
    * improved the built-in CodeRay theme to match Asciidoctor styles
    * link to CodeRay stylesheet if linkcss is set (#381)
    * added content_model to AbstractBlock, rename buffer to lines
    * use Untitled as document title in rendered output if document has no title
    * rename include-depth attribute to max-include-depth, set 64 as default value (#591)
  
negative.code:   * removed dependency on pending library, lock Nokogiri version to 1.5.10
    * removed require rubygems line in asciidoctor.rb, add to cli if RUBY_VERSION < 1.9
    * added tests for custom backends
    * added test that shorthand doesn't clobber explicit options (#481)
    * removed unnecessary monospace class from literal and listing blocks
  
  Distribution Packages::
  
  