Added new files:
openmmapi/include/openmm/NMLIntegrator.h
openmmapi/src/NMLIntegrator.cpp

platforms/reference/src/SimTKReference/ReferenceNMLDynamics.h
platforms/reference/src/SimTKReference/ReferenceNMLDynamics.cpp
openmmapi/include/openmm/EigenvectorInfo.h

Edited:
openmmapi/include/openmm/OpenMM.h
  * #include "openmm/NMLIntegrator.h"

olla/include/openmm/kernels.h
  * #include "openmm/NMLIntegrator.h"
  * Added a class IntegrateNMLStepKernel which extending KernelImpl

platforms/reference/src/ReferenceKernels.cpp
  * #include "SimTKReference/ReferenceNMLDynamics.h"
  * Added ReferenceIntegrateNMLStepKernel
  * Added Destructor, initialise and execute functions

platforms/reference/src/ReferenceKernels.h
  * added class ReferenceNMLDynamics at top
  * added class ReferenceIntegrateNMLStepKernel : public IntegrateNMLStepKernel

platforms/reference/src/ReferencePlatform.cpp
added registerKernelFactory(IntegrateNMLStepKernel::Name(), factory);

platforms/reference/src/ReferenceKernelFactory.cpp
added     if (name == IntegrateNMLStepKernel::Name())
        return new ReferenceIntegrateNMLStepKernel(name, platform, data);