Asciidoctor upgrade

I really don't know how to fix this problem of having to specify path to the gems explicitly. What I recommend is dropping down to the JRuby interfaces and figuring out what it takes to load so that the gems can be seen (try to evaluate `require 'asciidoctor'` using the scripting interface. Once that is solved, then we know what change, if any, we need to make in AsciidoctorJ. Best to cut AsciidoctorJ out of the equation while trying to debug using JRuby inside of a NetBeans plugin environment.