2016-02-18, Version 4.4.0 'Argon' (LTS)

Notable changes:

This update to the LTS line includes a number of semver minor changes
that have been staged for a number of months. This includes:

  * deps: backport 9da3ab6 from V8 upstream (Ali Ijaz Sheikh)
    - #3609
  * http: handle errors on idle sockets (José F. Romaniello)
    - #4482
  * src: add BE support to StringBytes::Encode() (Bryon Leung)
    - #3410
  * tls: add `options` argument to createSecurePair (Коренберг Марк)
    - #2441

There are also quite a large number of semver patch changes
including over 20 doc fixes and almost 50 test fixes.

Notable semver patch changes include:

  * deps: upgrade to npm 2.14.18 (Kat Marchán)
    - #5245
  * https: evict cached sessions on error (Fedor Indutny)
    - #4982
  * process: support symbol events (cjihrig)
    - #4798
  * querystring: improve parse() performance (Brian White)
    - #4675

PR-URL: #5301