Update node.js to 0.10.0 (new stable branch)

This branch brings significant improvements to many areas, with a focus on
API polish, ease of use, and backwards compatibility.

See full log for changes since 0.8.18:

https://raw.github.com/joyent/node/v0.10.0/ChangeLog

For a very brief overview of the relevant API changes since v0.8, please see

https://github.com/joyent/node/wiki/Api-changes-between-v0.8-and-v0.10