Fixes #3302

Said test relies a great deal on internals and implementation details (I should
know, I wrote it). Patch it up to work with libuv's new refcounting scheme.

The event loop's reference counting scheme in this version of libuv has changed.
Update the libuv bindings to reflect that fact.

Otherwise the cursor position was being reset to 0, even when there was
already part of a line, which was strange.

Part of #3295.

Fixes #3295.

In case a worker would spawn a new subprocess with process.env, NODE_UNIQUE_ID
would have been a part of the env. Making the new subprocess believe it is a
worker, this would result in some confusion if the subprocess where to listen to
a port, since the server handle request would then be relayed to the worker.

This patch removes the NODE_UNIQUE_ID flag from process.env on startup so any
subprocess spawned by a worker is a normal process with no cluster stuff.

Fix for joyent/node#3280

See #3234. TDB if this is or is not the desired behavior.

At the 'exit' event, it is sometimes not done writing to stdout.

Since fs.watch returns an event emitter where the change event is exactly
the same as the listener callback, the argument should be required

This reverts commit 5979f096.

Related:
- #3279
- #3278

Rather than omitting them.

A build failure was introduced on c9676c91
in SmartOS systems.  This makes it build properly.

This reverts commit f8519e10.

Recent update to V8 fixes the problem where it incorrectly reports the
line number as 0 for thrown RangeErrors.

http.get() now accepts either a URL (as a string) or an options object.

Conflicts:
	src/node.cc