Fixed #246 (#247)
Fixed #246 (#247)

o Added configuration for cache in travis build to prevent
   downloading of artifact for every build.
abelsromero/asciidoctor-maven-plugin,asciidoctor/asciidoctor-maven-plugin,asciidoctor/asciidoctor-maven-plugin,abelsromero/asciidoctor-maven-plugin,abelsromero/asciidoctor-maven-plugin,asciidoctor/asciidoctor-maven-plugin