Add node modules and new code for release

node_modules/verror/CONTRIBUTING.md

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+# Contributing
+
+This repository uses [cr.joyent.us](https://cr.joyent.us) (Gerrit) for new
+changes.  Anyone can submit changes.  To get started, see the [cr.joyent.us user
+guide](https://github.com/joyent/joyent-gerrit/blob/master/docs/user/README.md).
+This repo does not use GitHub pull requests.
+
+See the [Joyent Engineering
+Guidelines](https://github.com/joyent/eng/blob/master/docs/index.md) for general
+best practices expected in this repository.
+
+Contributions should be "make prepush" clean.  The "prepush" target runs the
+"check" target, which requires these separate tools:
+
+* https://github.com/davepacheco/jsstyle
+* https://github.com/davepacheco/javascriptlint
+
+If you're changing something non-trivial or user-facing, you may want to submit
+an issue first.