Update to the calculation of the diffraction patterns, before the support grid was incorrect.
Added function in main for square lenslet configurations, normalized the intensity distribution, normalized the lenslet centres, improved the readibility of mainWFS.py.
Applied suggestion made on the pull request.
Added module in WFS for the calculation of lensCentx/y for rectangular arrays.
Merged the master into this branch; minor changes in the main.py file
Added printing messages when the parameters are overwritten in lensArrayConfig
Merge pull request #78 from faitdivers/WFSUpdate

WFS update, and added function for rectangular setups in the main