message: add CMake options to turn off apps/plugins from build (leaving only sg)
diff: @@ -73,10 +73,19 @@ include_directories(
  external/imgui
  )
  -add_subdirectory(external)
  add_subdirectory(sg)
  +
  +option(BUILD_APPS "Build OSPRay Studio Apps" ON)
  +
  +if (BUILD_APPS)
  + add_subdirectory(external)
  add_subdirectory(app)
  +endif()
  ## Build plugins ##
  +option(BUILD_PLUGINS "Build plugins subtree" ON)
  +
  +if (BUILD_APPS AND BUILD_PLUGINS)
  add_subdirectory(plugins)
  +endif()
  