Prepare for next development iteration
Minor Gemfile improvements

Note: `date` is not necessary anymore, it's set by default.
Rename render/renderer_opts to convert/converter_opts (fixes #2)

To be consistent with Asciidoctor.
Add spec for Diffy::Format#minitest
Fix GeneratorTask#examples_path to not be initialized with frozen array
Add and use BaseExample#content_pretty for pp to clarify API
Fix template_dirs validation in AsciidocRenderer and write specs
Rename TemplateConverterAdapter to NoFallbackTemplateConverter and write specs
Beautify generated HTML examples
Fix generator to not lose descriptions
Add integration tests using Cucumber
Change style of badges to flat and parametrize URLs
Add basic support for LaTeX backends (WIP)
Change syntax of example's header for LaTeX to be more specific