Multiple fitting algorithm examples added to site source code

[zunzun.com]

For non-linear fitting, in addition to Levenberg-Marquardt I have added the following algorithms with examples to the site source code:

NelderMead, Powell, CG, BFGS, Newton-CG, Anneal, COBYLA, and SLSQP

See the top of the SolverService.py file and the new examples.  Please let me know if you have any questions.

     James