2011.03.02, Version 0.4.2 (stable)

* Improve docs.

* Fix process.on edge case with signal event (Alexis Sellier)

* Pragma HTTP header comma separation

* In addition to 'aborted' emit 'close' from incoming requests
  (Felix Geisendörfer)

* Fix memleak in vm.runInNewContext

* Do not cache modules that throw exceptions (Felix Geisendörfer)

* Build system changes for libnode (Aria Stewart)

* Read up the prototype of the 'env' object. (Nathan Rajlich)

* Add 'close' and 'aborted' events to Agent responses

* http: fix missing 'drain' events (Russell Haering)

* Fix process.stdout.end() throws ENOTSOCK error. (Koichi Kobayashi)

* REPL bug fixes (isaacs)

* node_modules folders should be highest priority (isaacs)

* URL parse more safely (isaacs)

* Expose errno with a string for dns/cares (Felix Geisendörfer)

* Fix tty.setWindowSize

* spawn: setuid after chdir (isaacs)

* SIGUSR1 should break the VM without delay

* Upgrade V8 to 3.1.8.