Pynfft

------------------------

* New simplified test suite.

----------------------

* Improved flag management: NFFT now only accepts the list of supported
flags listed in its documentaton.
* pynfft.util: utility functions listed in nfft3util.h. Only, the random
initializers and Voronoi weights computation functions have been wrapped.
* Changelog is no longer part of the sphinx tree.

------------------------

* Fixed issue 1: crash in test_nfft due to use of MALLOC flags

----------------------

* Improve precomputation flag management in NFFT and Solver classes
* Various code improvements
* Update documentation for all modules

------------------------

* Add sphinx documentation

------------------------

* Level-up Solver class with the improvement made on NFFT
* Update test suite for pynfft.nfft