Fix document header of README
Fixes #113. Allow alternative definitions for 'sourcedocumentNames'
Fix build breakage due to CodeNarc violations
Fixed #112. When 'processAsciidocSources' is called 'classpath' is not set, default to useing the ASCIIDOCTOR configuration
Merge pull request #117 from ysb33r/master

Fixes #112
Merged README
A better fix for #113