Add initial ditaa support
Change name to asciidoctor-diagram and restructure project a bit
Resolve runtime issues on jruby
Merge pull request #12 from pepijnve/ditaa

Add ditaa support and restructure project as a general diagram extension
add Ruby 2.1.0 to travis build
migrate README to AsciiDoc, update title and description
Add usage documentation to README
Use asciidoc hyperlink syntax instead of markdown
Update homepage in gemspec
Reset rubygems specification load cache. We're loading the same spec with different variable values and this doesn't work as intended if the gemspec is kept in the cache.