* documenting the PathNode class
* trying to track down the empty stringbuffer on twice called PathTree.setContentSets
* cleaned up the unit test helper (TestHelpers)
* bonding the PathNode and NodePair more closely together.
* NO LONGER USING THE condensePathNodes logic
* moar unit test to ensure the logic can go there, and back again
* cleanup of multiline ternary statements
* adding logging, at least for a minute
* working through the PathTree.validate(path) logic
* BUG: in the populate tree path, calling a stringbuffer charAt(0)
* moar unit testing to iron things out.
