GitLab

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

Fixed bug where MonteCarloBarostat would leave molecules seeming to be outside the first periodic box

Optimization to nonbonded forces: replaced divides by multiplies when applying periodic boundary conditions

All platforms now handle nonbonded exceptions in a consistent way (they ignore cutoffs and periodic boundary conditions).  Also started OpenCL implementation of CustomHbondForce.