DOC: draft of python version justification
DOC: draft of python version justification

tacaswell/scikit-beam,scikit-xray/scikit-xray,tacaswell/scikit-xray,Nikea/scikit-xray,danielballan/scikit-xray,danielballan/scikit-xray,scikit-xray/scikit-xray,ericdill/scikit-xray,tacaswell/scikit-beam,Nikea/scikit-xray,ericdill/scikit-xray,scikit-xray/scikit-xray,Nikea/scikit-xray,danielballan/scikit-xray,ericdill/scikit-xray,tacaswell/scikit-xray,tacaswell/scikit-beam,tacaswell/scikit-xray