Starting to separate the "documentation code" from the library.
Small changes to the simple mock galaxy.
Fixed bug creating planes image.
Initial fit using Differential Evolution.

Added option to retry a fit using Nelder-Mead simplex if least squares fails.
Added linear fitted "smooth parameter" function. Still missing a way to choose the smoothing.

Multipass now will retry fit using alternate method.
Changed names of planes files to avoid collision.