Gets very close to what is needed for property Jacobian

Everything seems pretty promising aside from the mutant, which requires additional thought. How can we store the mutant in AllowedModels

Closes https://github.com/usnistgov/teqp/issues/15

Changed to moves, and renamed the exposed attributes

* Adding the 2-Center Lennard-Jones model developed by Mecke and the revised version of Lisal

* Added dipolar and quadrupolar contributions to 2CLJF model

Yet another forceeval

Found the first real bug in autodiff: https://github.com/autodiff/autodiff/issues/242

And add test

And to python interface

Hours later...

Yet another battle with typing