2012.02.01, Version 0.7.2 (unstable)

* Update V8 to 3.8.9

* Support for sharing streams across Isolates (Igor Zinkovsky)

* #2636 - Fix case where http_parsers are freed too early (koichik)

* url: Support for IPv6 addresses in URLs (Łukasz Walukiewicz)

* child_process: Add disconnect() method to child processes (Andreas Madsen)

* fs: add O_EXCL support, exclusive open file (Ben Noordhuis)

* fs: more specific error messages (Tj Holowaychuk)

* tty: emit 'unknown' key event if key sequence not found (Dan VerWeire, Nathan Rajlich)

* build: compile release build too if BUILDTYPE=Debug (Ben Noordhuis)

* module: fix --debug-brk on symlinked scripts (Fedor Indutny)

* zlib: fix `Failed to set dictionary` issue (Fedor Indutny)

* waf: predict target arch for OS X (Fedor Indutny)