Add a setup command to generate package.json

Review Request #8787 — Created Feb. 28, 2017 and submitted March 2, 2017, 1 p.m.

Description

Running setup.py list_node_deps will now generate a package.json that
lists all the node.js dependencies of the project.

Testing Done


Ran setup.py list_node_deps and saw expected output.
Ran setup.py install_node_deps and it succeeded.

Issues

Description	From	Last Updated
'is_release' imported but unused	reviewbot	March 2, 2017, 12:59 p.m.

Tool: Pyflakes
Processed Files:
    setup.py



Tool: PEP8 Style Checker
Processed Files:
    setup.py

setup.py (Diff revision 1)
Show all issues
```
 'is_release' imported but unused
```

Ship it!

Once Review Bot is happy, I'm happy. (I know that was from before your change, though.)

Pushed to release-2.0.x (7f68a00)

You have a pending review.

setup.py (Diff revision 1)