message: Implement module version check
diff: #include "common/OSPCommon.h"
  -// TODO WILL: Seems like we should have dllexport for all the other structs
  -// and functions in the MPI module as well? Why aren't they tagged?
  -extern "C" OSPRAY_DLLEXPORT void ospray_init_module_mpi() {}
  +extern "C" OSPError ospray_module_init_mpi(
  + int16_t versionMajor, int16_t versionMinor, int16_t /*versionPatch*/)
  +{
  + return ospray::moduleVersionCheck(versionMajor, versionMinor);
  +}
  