integrate the code for the "normalized scattering representation" defined by Stephane in his paper "Group Invariant Scattering"
New function used to reorder the scattering coefficients (useful for some displays, in particular GIS ones)
Add this new function which computes scattering for multiple values of J
Add this new function which reorder Scattering coefficients
Integrate the new scripts to the soft.

They enable to reproduce the figures presented in the paper "Group
Invariant Scattering" by Stephane
Integrated the code from Stephane's soft to this new one

This function adapted from the one Stephane wrote enable to plot the
normed scattering vector.
Integrated Stephane's code for this function to our soft.