Generate natural text from an EDTFObject #4

EDTFObjects only return their EDTF string representation, which isn't the best format to show to people not familiar with the format.

The current recommended approach is to generate EDTF from natural text, and store both. It would be nice if you could derive a basic natural language representation from the EDTF object.

The variety of languages and localisations will be a factor. E.g. US English tends to prefer "May 28, 2010" and British English tends to use "28 May, 2010". Something that takes advantage of existing localisation frameworks would be most useful.