issue-43: updated group organization in source files
issue-43: updated group organization in source files

adamdahan/GraphKit,CosmicMind/GraphKit,CosmicMind/GraphKit,CosmicMind/Graph,CosmicMind/Graph,GraphKit/GraphKit-swift,GraphKit/GraphKit,GraphKit/swift,adamdahan/GraphKit,GraphKit/swift,GraphKit/GraphKit,GraphKit/GraphKit-swift