Wrapper for the Zoltan data management library

 PyZoltan is as the name suggests, is a Python wrapper for the
 Zoltan data management library.
 .
 In PyZoltan, only specific routines and objects are wrapped.
 The following features of Zoltan are currently supported:
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  * Dynamic load balancing using geometric algorithms
  * Unstructured point-to-point communication
  * Distributed data directories