Suggested edit for tune_test workup
Suggested edit for tune_test workup

Propsed change to tuning.workup attempt to use a gaussian fit, which
avoids problems of uncentered curves. If the gaussian fit fails, it uses
the moments value, but this might create problems of a radically
different point along a path. See 2017-05-01 61264 queue\000 TUNE
TEST\000 [w1, wm]\tune test.png for inspiration.

wright-group/WrightTools,wright-group/WrightTools