Small update to supervoxel clustering tutorial
apps cmake wasn't cascading when deps wasn't found.
Fix for building cloud editor in Mac

related to #364
CLang won't support OpenMP in the near future (http://clang-omp.github.io/)
Merge pull request #379 from nizar-sallem/clang_openmp

CLang won't support OpenMP in the near future
Merge pull request #376 from fran6co/fix-cmake-apps

apps cmake wasn't cascading when deps weren't found.
Merge pull request #378 from fran6co/patch-4

Fix for building cloud editor in Mac
Merge pull request #375 from jpapon/supervoxel_tutorial_fix

Small update to supervoxel clustering tutorial