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Molecular dynamics by NMR data analysis

Brought to you by: edauvergne, troelslinnet

Shifted the ensemble pivot finding target function into the maths_fns package.

Authored by: bugman 2013-03-01

changed	/trunk/generic_fns/structure/superimpose.py
copied	/trunk/generic_fns/structure/superimpose.py -> /trunk/maths_fns/ens_pivot_finder.py

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