GitLab

* Replace SimTK-containing file headers

* Update file headers for new Tinker reader files added

* Optimize CustomNonbondedForce.updateParametersInContext()

* Optimized uploading changed values to GPU

* Optimized updateParametersInContext() for lots of bonded forces

* Optimized updateParametersInContext() for CustomExternalForce

* Optimized updateParametersInContext() for NonbondedForce

* Code changes for HIP platform

* Minor optimization to validating exclusions

* Optimizations to findMoleculeGroups()

* Added FAQ links to error messages

* Added missing Windows export

* Reference implementation of computed values for CustomNonbondedForce

* CPU implementation of computed values for CustomNonbondedForce

* Common implementation of computed values for CustomNonbondedForce

* Serialization of computed values

* ForceField supports computed values

CustomNonbondedForceImpl long-range correction.

Long range correction for both NonbondedForce and CustomNonbondedForce takes the switching function into account

Refactored ForceImpl, lots of KernelImpl subclasses, and other related classes to avoid redundant calculations when requesting a State with both forces and energies

Redesigned CustomNonbondedForce to eliminate combining rules and allow the expression to directly use parameters for individual particles.