GitLab

Changes necessary for VS2015

Added missing support for LocalCoordinatesSite

addExtraParticles() can use bonds to select positions

ForceField will not create duplicate constraints

Fixed a race condition in energy computation

Update appveyor.yml

Fix a handful of compiler warnings

These are worth fixing because they're in header files that are always included
(rather than just hitting them at OpenMM compile-time). The SWIG interface now
builds without warnings on my machine.

Implemented CompoundIntegrator

Added Context::getParameters()

Added neutralize option to addSolvent()