GitLab

Integrators control when atom reordering gets done, instead of having it happen automatically when forces are evaluated.  This simplifies some code, and also improves unintuitive behavior with CustomIntegrator.

OpenCLArray is no longer templatized and doesn't provide a host buffer.  This is in preparation for adding mixed/double precision support.

On Fermi, store forces as 64 bit fixed point and update with atomic operations.  Also various other minor optimizations.

Moved SFMT into libraries folder, and restructured it to allow multiple independent random number generators

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

Increased the tolerance on two tests that started failing when we switched the reference platform to double precision

Use a consistent (and more accurate) value for electric constant everywhere.  Also cleaned up handling of constants and units in various places.