Release 4.4.6 (stable)

[Valeri Karpov]

4.4.6 / 2016-03-02
==================
 * fix: upgrade mongodb driver to 2.1.7 #3938
 * docs: fix plugins link #3917 #3909 [fbertone](https://github.com/fbertone)
 * fix(query): sort+select with count works #3914
 * fix(query): improve mergeUpdate's ability to handle nested docs #3890

New Bugs
========

Please report any issues if they do not already exist:
https://github.com/Automattic/mongoose/issues/new

Security
======

If your application uses buffers, you should upgrade to >= 4.3.6 or ~3.8.39. See this GitHub issue for more information https://github.com/Automattic/mongoose/issues/3764.