2016-02-16, Version 4.3.1 'Argon' (LTS)

Notable changes:

* buffer: make byteLength work with Buffer correctly (Jackson Tian)
  - https://github.com/nodejs/node/pull/4738
* debugger: guard against call from non-node context (Ben Noordhuis)
  - https://github.com/nodejs/node/pull/4328
* node_contextify: do not incept debug context (Myles Borins)
  - https://github.com/nodejs/node/pull/4819
* deps: update to http-parser 2.5.2 (James Snell)
  - https://github.com/nodejs/node/pull/5238

PR-URL: https://github.com/nodejs/node/pull/5200#issuecomment-184897483