Several improvements to the Saxs module
As the title states I did some improvements to the Saxs module. Most important that I added a physcial integration test to check that the Fourier Transform of the RDF is the same as the structure factor, which especially will make @schlaicha happy. Along these lines I added an example and an explanation for the theory behind this.
Additionally, I added a weights arguments to the cython function compute_structure_factor
. This is currentlty not used by any module but I will write one in an upcoming MR.
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Edited by Philip Loche