Update node.js to 0.8.16.

2012.12.13, Version 0.8.16 (Stable)
* npm: Upgrade to 1.1.69
* fs: fix WriteStream/ReadStream fd leaks (Ben Noordhuis)
* crypto: fix leak in GetPeerCertificate (Fedor Indutny)
* buffer: Don't double-negate numeric buffer arg (Trevor Norris)
* net: More accurate IP address validation and IPv6 dotted notation.
  (Joshua Erickson)

2012.11.26, Version 0.8.15 (Stable), fdf91afb494a7a2fff2913d817f589c191a2c88f
* npm: Upgrade to 1.1.66 (isaacs)
* linux: use /proc/cpuinfo for CPU frequency (Ben Noordhuis)
* windows: map WSAESHUTDOWN to UV_EPIPE (Ben Noordhuis)
* windows: map ERROR_GEN_FAILURE to UV_EIO (Bert Belder)
* unix: do not set environ unless one is provided (Charlie McConnell)
* domains: don't crash if domain is set to null (Bert Belder)
* windows: fix the x64 debug build (Bert Belder)
* net, tls: fix connect() resource leak (Ben Noordhuis)