message: add ability to set affinity as a "--osp:setaffinity" option
diff: @@ -100,6 +100,9 @@ namespace ospray {
  } else if (parm == "--osp:numthreads" || parm == "--osp:num-threads") {
  device->findParam("numThreads", true)->set(atoi(av[i+1]));
  removeArgs(ac,av,i,2);
  + } else if (parm == "--osp:setaffinity" || parm == "--osp:affinity") {
  + device->findParam("setAffinity", true)->set(atoi(av[i+1]));
  + removeArgs(ac,av,i,2);
  } else {
  ++i;
  }
  