Nix DataMarshaller.isSimple
Function renaming and added docs to new DataMarshaller methods.

Per feedback from teh conkling.
Added a primitive list page for testing, and regenerated.
Get the primitive list test working for JSON.
Primitive lists for XML complete, passing tests.

List children are formated as <list><value>42</value></list>. As with complex lists, the child
element name is inconsequential, value is simply the default used when writing out a primitive list.