Issue66

Found only a bug in the main where centLensx/y must be an array instead of a list. When this was solved the mainWFS.py worked without any errors. Also included a test function and made some adjustments to the mainWFS.py regarding the number of samples the intensity distribution has.
Python 2.7.6
NumPy 1.8.0
SciPy 0.13.3
OS Window 7 Ultimate service pack 1 32bit