Expose intermediate prettyprint data structure directly

[plajjan]

The prettyprint() function recursively moves over a jxmlease data structure and produces a new intermediate structure of native dicts and lists which is then feed into the standard pprint function (potentially using a small backup version instead). I wonder, would it not be better to split this in two parts, the first that generates the data structure and the second doing the prettyprinting. The reason I'm asking for this is that I think that intermediate data structure could come in handy, especially if it can be made to return OrderedDict, in converting to other data formats. Thoughts?