message: don't install 3rdParty and some internal headers in ospray_sg
diff: @@ -189,4 +189,6 @@ install(DIRECTORY ${CMAKE_CURRENT_LIST_DIR}
  DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/ospray
  FILES_MATCHING
  PATTERN *.h
  + PATTERN *3rdParty* EXCLUDE
  + PATTERN importer/detail_xyz EXCLUDE
  )
  