2015-03-06 io.js v1.5.0 Release

Notable changes:

* buffer: New `Buffer#indexOf()` method, modelled off `Array#indexOf()`.
  Accepts a String, Buffer or a Number. Strings are interpreted as UTF8.
  (Trevor Norris) https://github.com/iojs/io.js/pull/561
* fs: `options` object properties in `'fs'` methods no longer perform a
  `hasOwnProperty()` check, thereby allowing options objects to have
  prototype properties that apply. (Jonathan Ong)
  https://github.com/iojs/io.js/pull/635
* tls: A likely TLS memory leak was reported by PayPal. Some of the recent
  changes in stream_wrap appear to be to blame. The initial fix is in
  https://github.com/iojs/io.js/pull/1078, you can track the progress
  toward closing the leak at
  https://github.com/iojs/io.js/issues/1075 (Fedor Indutny).
* npm: Upgrade npm to 2.7.0. See npm CHANGELOG.md:
  https://github.com/npm/npm/blob/master/CHANGELOG.md#v270-2015-02-26
  for details including why this is a semver-minor when it could have
  been semver-major.
* TC: Colin Ihrig (@cjihrig) resigned from the TC due to his desire to do
  more code and fewer meetings.