GitLab

* PythonForce can be restricted to a subset of particles

* Fix exception with CUDA

* Initial implementation of PythonForce

* Continuing implementation of PythonForce

* Tests for PythonForce

* Fix memory leaks

* Documentation for PythonForce

* Fixed incorrect return type

* Fix compilation error on Python older than 3.12

* Handle all dtypes

* Optimizations to PythonForce

* Optimized getPositions()

* Test all platforms

* Fix test failures

* Replace SimTK-containing file headers

* Update file headers for new Tinker reader files added

* Implemented CustomCPPForceImpl

* Documentation for CustomCPPForceImpl

* Attempt at fixing Windows compilation error

* Improved documentation

Modified the API for lots of classes so that the number of particles/bonds/etc. need not be specified in the constructor.

Continuing to implement ReferencePlatform (implemented kinetic energy calculation and LangevinIntegrator)

Created a test case for StandardMMForceFieldImpl's findExclusions() method.  Fixed some bugs that it found.  Created a CMake script and configured it for building and running test cases.