add example program that calculates fourier moment features
implement weight function in fourier moments example
fix bug in weight function calculation: calculate ksq correctly
calculate theta averaged psf component of weight function
make output prettier
Include dksq term in moment integral calculation
generalize circularize function
ignore ipython notebook files
Refactor fourierMoments into featureCalculator class
replace featureMatrix with featureCalculator
Add descriptions
Move psf check before data check
Rename variables in circularize method for clarity
Use abc module's abstract method decorator for AbsFeatureCalculator
Write more verbose docstrings. Return real values instead of complex.
Use default PixelFeatures feature calculator in Estimator class
add features module to bashes module
Fix errors in  Estimator class
Merge pull request #10 from deepzot/#3

Implement Fourier moment calculator #3