closes #356 : added note about use of hidden files and resources (#357)
closes #356 : added note about use of hidden files and resources (#357)

* added note about use of hidden files and resources

* reworded note about use of _ prefix

asciidoctor/asciidoctor-maven-plugin,asciidoctor/asciidoctor-maven-plugin,abelsromero/asciidoctor-maven-plugin,asciidoctor/asciidoctor-maven-plugin,abelsromero/asciidoctor-maven-plugin,abelsromero/asciidoctor-maven-plugin