Created API and reference implementation of restricting CustomNonbondedForce to selected interaction groups
Created CUDA implementation of restricting CustomNonbondedForce to selected interaction groups
Fixed Python API for CustomNonbondedForce.addInteractionGroup()
Bug fixes and an optimization to CustomNonbondedForce with interaction groups
Began creating OpenCL implementation of CustomNonbondedForce interaction groups
Finished OpenCL implementation of interaction groups
Bug fixes to interaction groups
Implemented long range correction for interaction groups
Merge pull request #98 from peastman/groups

CustomNonbondedForce can restrict the computation to particular groups of atoms