Add's unique names to nodes in the StormDag, and an associated law. Should be deterministic with a shift from Set's to Lists in the StormDag for deterministic traversal
Merge branch 'develop' of github.com:twitter/summingbird into feature/online_graph_node_names
remove white space and some simplification
Merge pull request #239 from twitter/feature/online_graph_node_names

Feature/online graph node names