Fixes bug with previously taken names for nodes, append a number at the end
Rename Lut -> LookupTable
Make the Dependants deterministic by building as a list rather than a set
minor display changes
Fix tests and address comments
Add comment
Remove last :+
Add tests for the new dependents. And fix bug therein
Merge pull request #230 from twitter/feature/fix_dotgraph_bug

Fixes bug with previously taken names for nodes, append a number at the ...