[NTG-context] Līberum Cōnsilium: an example ConTeXt document

Hi, Here technical document in ConTeXt. It goes a bit beyond the basics but is not complex. The source code is available: https://bitbucket.org/djarvis/world-politics/src/master/xml/tex/ The output: https://bytebucket.org/djarvis/world-politics/raw/master/xml/tex/manual.pdf Comments, critiques, and questions are welcome. Thank you for your generous help.