Thanks Hagen.

Initial patch by Tim Caswell.

Deprecation warnings have been added to help the conversion to this new API.

This is similar to the class node.File which was removed in
82cb1b5a.

Needs documentation.

Since the buffer is passed to the thread pool it needs to be heap allocated.
Thanks to Jon Crosby and Tim Caswell for debugging this.

Was sending two packets instead of one for some short messages, and even 3,
for short chunked-encoded messages. Also use the more general Encode()
function for receiving HTTP bodies.

Gives ~6% improvement on "hello world" web server benchmarks.

Removes node.UTF8, node.RAW, node.ASCII enum versions of the encodings.
node.fs.read() now supports "raws" encoding.

Was causing send() to throw argument errors because arrays of ints would get
paired with the "raws" encoding. The bug was introduced in 8eb1294f.

In Snow Leopard "platform.machine()" returns "i386" while
"platform.architecture()" returns ('64bit',''). Using information from both
we can determine the proper architecture

This reverts commit ea29e137 re-enabling the
64bit build on Macintosh.

Instead of

  myemitter.emit("event", [arg1, arg2, arg3]);

the API is now

  myemitter.emit("event", arg1, arg2, arg3);

This change saves the creation of an extra array object for each event.
The implementation is also slightly more simple.

This reverts commit 412b4636.