2015-02-26 io.js v1.4.1 Release

Notable changes:

* process / promises: An'unhandledRejection' event is now emitted on
  process whenever a Promise is rejected and no error handler is
  attached to the Promise within a turn of the event loop. A
  'rejectionHandled' event is now emitted whenever a Promise was
  rejected and an error handler was attached to it later than after an
  event loop turn. See the process documentation for more detail.
  https://github.com/iojs/io.js/pull/758 (Petka Antonov)
* streams: you can now use regular streams as an underlying socket for
  tls.connect() https://github.com/iojs/io.js/pull/758 (Fedor Indutny)
* http: A new 'abort' event emitted when a http.ClientRequest is
  aborted by the client. https://github.com/iojs/io.js/pull/945
  (Evan Lucas)
* V8: Upgrade V8 to 4.1.0.21. Includes an embargoed fix, details
  should be available at
  https://code.google.com/p/chromium/issues/detail?id=430201
  when embargo is lifted. A breaking ABI change has been held back
  from this upgrade, possibly to be included when io.js merges V8 4.2.
  See https://github.com/iojs/io.js/pull/952 for discussion.
* npm: Upgrade npm to 2.6.0. Includes features to support the new
  registry and to prepare for npm@3. See npm CHANGELOG.md
  https://github.com/npm/npm/blob/master/CHANGELOG.md#v260-2015-02-12
  for details.
* libuv: Upgrade to 1.4.2. See libuv ChangeLog
  https://github.com/libuv/libuv/blob/v1.x/ChangeLog for details of
  fixes.