Fixes intersection when a matrix node got several children
Removes useSourceUrl option
Merge pull request #126 from cedricpinson/bug/intersection-several-children

Fixes intersection when a matrix node got several children
Adds modelWorld and View Matrix and shader uniform.
Clean diff
Adds getModelViewMatrix for backward compatibility
Reset clouds samples because it should be deleted
Restores Camera, it does not need change yet
Limit diff from develop
Removes bounding box stack for now