2011.04.01, Version 0.4.5 (stable)

* Fix listener leak in stream.pipe() (Mikeal Rogers)

* Retain buffers in fs.read/write() GH-814 (Jorge Chamorro Bieling)

* TLS performance improvements

* SlowBuffer.prototype.slice bug GH-843

* process.stderr.write should return true

* Immediate pause/resume race condition GH-535 (isaacs)

* Set default host header properly GH-721 (isaacs)

* Upgrade V8 to 3.1.8.8
