message: find glfw for distrib viewer
diff: ospray_disable_compiler_warnings()
  +find_package(GLFW REQUIRED)
  +
  include_directories(${CMAKE_SOURCE_DIR}/apps/common
  - ${CMAKE_SOURCE_DIR}/apps/exampleViewer)
  + ${CMAKE_SOURCE_DIR}/apps/exampleViewer
  + ${GLFW_INCLUDE_DIRS})
  ospray_create_application(ospDistribViewerDemo
  ospDistribViewerDemo.cpp
  @@ -31,5 +34,6 @@ LINK
  ospray_sg
  ospray_tfn
  gensv
  + ${GLFW_LIBRARY}
  )
  