Cleaned up Python bindings to restore functionality:
* StaticPersistence is iterable, its nodes are usable (sign, pair, cycle)
* StaticPersistence knows how to map its nodes into Filtration indices
* moved PythonCmp into utils.h
* minor cosmetic changes
/*
* Author: Dmitriy Morozov
* Department of Computer Science, Duke University, 2006--2008
*
* For now file exists only to store the main page of the documentation
*/
/** \mainpage
* Detailed description of Dionysus with references to all the classes,
* and code samples goes here.
*/
/**
* \defgroup topology Topology Classes
*/
/**
* \defgroup geometry Geometry Classes
*/
/**
* \defgroup kinetic Kinetic Data Structures Classes
* \ingroup geometry
*/