Fixing license.
Merge pull request #398 from ycombinator/working

Fixing namespace.
Merge pull request #399 from ycombinator/fix-license

Fixing license.
Only add the node if it is new.
Merge pull request #400 from ycombinator/clb-add-more-nodes

Only add the node if it is new.
Only add the node if it is new.
Merge branch 'master' into working