2016-03-08, Version 5.8.0 (Stable)

Notable changes:

* child_process: “send()” now accepts an options parameter (cjihrig)
https://github.com/nodejs/node/pull/5283
- Currently the only option is “keepOpen”, which keeps the underlying
socket open after the message is sent.
* constants: “ENGINE_METHOD_RSA” is now correctly exposed (Sam Roberts)
https://github.com/nodejs/node/pull/5463
* Fixed two regressions which originated in v5.7.0:
  - http: Errors inside of http client callbacks now propagate
correctly (Trevor Norris) https://github.com/nodejs/node/pull/5591
  - path: Fixed normalization of absolute paths (Evan Lucas)
https://github.com/nodejs/node/pull/5589
* repl: “start()” no longer requires an options parameter (cjihrig)
https://github.com/nodejs/node/pull/5388
* util: Improved “format()” performance 50-300% (Evan Lucas)
https://github.com/nodejs/node/pull/5360

PR-URL: https://github.com/nodejs/node/pull/5559