tree bbc54c7a31ea23f881398208a87af711347417cc
parent 8ffe1e4424799a58e7f664a982b9417f5555d12d
author Brad Bishop <bradleyb@us.ibm.com> 1459535386 -0400
committer Brad Bishop <bradleyb@us.ibm.com> 1460724242 -0400

Add dictionary export to PathTree

PathTree is a dictionary extension with paths as keys and lets
you do things like iterate on subpaths, etc.  Internally it is
implemented as a nested dictionary but on the outside it acts
like a normal dictionary.

This change enables exporting a PathTree structure as a nested
dictionary, which is useful for python_2_xyz encoders that understand
nested data structures.