GitLab

Fixed getTime() calls in _openMMBrookInterface()
Based on Sherm's suggestions:
changed '#ifdef WIN32' to '#ifdef WIN32 _MSC_VER;
reordered include files so that system files after OpenMM files
all include files should be C++ files now (as opposed to C files (<math.h> -> <cmath>

License header changes; force duplication factor to 4; fixed potential problem w/ Shake -- if no constraints, pgm crashes

Added  'OPENMM_EXPORT'  to class declaration to deal w/ linking issue associated w/ virtual methods in class
Modified brook/brook-cmake/FindBrook.cmake to only look in $BROOKROOT directory for Brook files