2016-03-23, Version 5.9.1 (Stable)

Notable changes:

* buffer: Now properly throws RangeErrors on out-of-bounds writes (Matt
Loring) https://github.com/nodejs/node/pull/5605
  - This effects write{Float|Double} when the noAssert option is not
used.
* timers:
  - Returned timeout objects now have a Timeout constructor name
(Jeremiah Senkpiel) https://github.com/nodejs/node/pull/5793
  - Performance of Immediate processing is now ~20-40% faster (Brian
White) https://github.com/nodejs/node/pull/4169
* vm: Fixed a contextify regression introduced in v5.9.0 (Ali Ijaz
Sheikh) https://github.com/nodejs/node/pull/5800

PR-URL: https://github.com/nodejs/node/pull/5831