2011.05.20, Version 0.4.8 (stable)

* #974 Properly report traceless errors (isaacs)

* #983 Better JSON.parse error detection in REPL (isaacs)

* #836 Agent socket errors bubble up to req only if req exists

* #1041 Fix event listener leak check timing (koichik)

*	#1038 Fix dns.resolve() with 'PTR' throws Error: Unknown type "PTR"
  (koichik)

* #1073 Share SSL context between server connections (Fedor Indutny)

* Disable compression with OpenSSL. Improves memory perf.

* Implement os.totalmem() and os.freemem() for SunOS (Alexandre Marangone)

* Fix a special characters in URL regression (isaacs)

* Fix idle timeouts in HTTPS (Felix Geisendörfer)

* SlowBuffer.write() with 'ucs2' throws ReferenceError. (koichik)

* http.ServerRequest 'close' sometimes gets an error argument
  (Felix Geisendörfer)

* Doc improvements

* cleartextstream.destroy() should close(2) the socket. Previously was being
	mapped to a shutdown(2) syscall.

* No longer compile out asserts and debug statements in normal build.

* Debugger improvements.

* Upgrade V8 to 3.1.8.16.
