This addresses this in several ways:
* Created mechanism to load 'commented' JSON (using '//' or '#' comments on a single line)
* Embedded comments into the mycroft.conf, indicating use, legal values, and where they get overridden
* Create ConfigurationManager.instance() static method to replace ConfigurationManager.get(). This produces more readable code like:
ConfigurationManager.instance().get("value") instead of ConfigurationManager.get().get("value")
* Made _ConfigurationListener 'private'
* docstring'ed things
penrods