GitLab

Enforce memory alignment to improve performance of vector operations.  Also fixed bugs in an earlier optimization.

Optimizations to CPU nonbonded forces: better load balancing between threads, use linear splines instead of cubic

Platform specific header files get installed.  This allows plugins to be built with just an OpenMM installation, not a full source tree.

NonbondedForce sometimes included energy terms that weren't appropriate to the specified force groups

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