* V8: upgrade to 3.18.0

* uv: Upgrade to v0.11.1

* http: split into multiple separate modules (Timothy J Fontaine)

* http: escape unsafe characters in request path (Ben Noordhuis)

* url: Escape all unwise characters (isaacs)

* build: depend on v8 postmortem-metadata if enabled (Paddy Byers)

* etw: update prototypes to match dtrace provider (Timothy J Fontaine)

* buffer: change output of Buffer.prototype.toJSON() (David Braun)

* dtrace: actually use the _handle.fd value (Timothy J Fontaine)

* dtrace: pass more arguments to probes (Dave Pacheco)

* build: allow building with dtrace on osx (Dave Pacheco)

* zlib: allow passing options to convenience methods (Kyle Robinson Young)