doc: make the deprecations consistent

The deprecation messages in the documentations should be in the format

    Stability: 0 - Deprecated: Use [alternate] instead.

so that they will be consistent.

PR-URL: https://github.com/nodejs/node/pull/2450


Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: James M Snell <jasnell@gmail.com>