Removed test source block committed in error.
Update to depend on asciidoctorj-1.5.0.
Include usage from README rather than including directly pom.xml.

Workaround for asciidoctor/asciidoctor#1072, tagged regions not working in XML.
Update coderay and table styles from asciidoctor 1.5.0.
Updated to 1.5.0 monospace syntax.