2013.01.18, Version 0.8.18 (Stable)

* npm: Upgrade to v1.2.2

* dns: make error message match errno (Dan Milon)

* tls: follow RFC6125 more stricly (Fedor Indutny)

* buffer: reject negative SlowBuffer offsets (Ben Noordhuis)

* install: add simplejson fallback (Chris Dent)

* http: fix "Cannot call method 'emit' of null" (Ben Noordhuis)