message: now removing all RefCount's from sg/ that grep can find ...
diff: #include "sg/common/Common.h"
  // ospcommon
  -#include "ospcommon/RefCount.h"
  #include "ospcommon/AffineSpace.h"
  // std
  #include <vector>
  @@ -41,7 +40,7 @@ namespace ospray {
  DONT_FOLLOW_INSTANCES
  } Mode;
  - struct Instantiation : public RefCount {
  + struct Instantiation {
  std::shared_ptr<Instantiation> parentWorld;
  affine3f xfm;
  @@ -49,7 +48,7 @@ namespace ospray {
  };
  /*! describes one object that we encountered */
  - struct Object : public RefCount {
  + struct Object {
  /*! the node itself - this is intentionally NOT a shared_ptr
  since nodes call this with 'this', for which we have no
  shared_ptr info */
  