Added ability to use externally computed normals to supervoxel clustering
This commit fixes #247 - label colors are now created dynamically as needed
Update to issue #247 to avoid breaking api
Merge pull request #264 from jpapon/remove_max_label

Remove max label in supervoxel_clustering
Merge pull request #263 from jpapon/add_input_normals

Added ability to use externally computed normals to supervoxel clustering