message: fix issues found by review
diff: *
  * On Linux build it in the build_directory with
  * g++ ../apps/tutorials/ospTutorial.cpp -I ../ospray/include -I ../components \
  - * -L . -lospray -lospray_common -Wl,-rpath,. -o ospTutorial
  + * -L . -lospray -Wl,-rpath,. -o ospTutorial
  * On Windows build it in the build_directory\$Configuration with
  * cl ..\..\apps\tutorials\ospTutorial.cpp /EHsc -I ..\..\ospray\include -I ..\.. -I ..\..\components ospray.lib
  */
  