Rename C++ Estimator Class to EstimatorEngine. Rearrange C++ directories.
Implement python/C++ wrapper for EstimatorEngine
Remove command line compile instruction
Move python path detection from top-level SConstruct to pysrc/SConscript
rename c++ Estimator file to EstimatorEngine
Add C++ functions that take numpy array inputs
Move C++/python array functions to separate file
Add numpy defines suggested in numpy c-api reference
expand bpn namespace abbreviation
Merge pull request #7 from deepzot/#2

Python wrapper for Estimator C++ class #2
add example program that calculates fourier moment features
implement weight function in fourier moments example