Prepare for the release.

Update .mailmap, AUTHORS and MAINTAINERS files.

Signed-off-by: Richard Scothern <richard.scothern@docker.com>

AUTHORS

@@ -6,6 +6,8 @@ Adrian Mouat <adrian.mouat@gmail.com>
 Ahmet Alp Balkan <ahmetalpbalkan@gmail.com>
 Alex Chan <alex.chan@metaswitch.com>
 Alex Elman <aelman@indeed.com>
+Alexey Gladkov <gladkov.alexey@gmail.com>
+allencloud <allen.sun@daocloud.io>
 amitshukla <ashukla73@hotmail.com>
 Amy Lindburg <amy.lindburg@docker.com>
 Andrew Hsu <andrewhsu@acm.org>
@@ -30,6 +32,7 @@ Brian Bland <brian.bland@docker.com>
 burnettk <burnettk@gmail.com>
 Carson A <ca@carsonoid.net>
 Chris Dillon <squarism@gmail.com>
+cyli <cyli@twistedmatrix.com>
 Daisuke Fujita <dtanshi45@gmail.com>
 Daniel Huhn <daniel@danielhuhn.de>
 Darren Shepherd <darren@rancher.com>
@@ -52,6 +55,7 @@ Felix Yan <felixonmars@archlinux.org>
 Florentin Raud <florentin.raud@gmail.com>
 Frederick F. Kautz IV <fkautz@alumni.cmu.edu>
 gabriell nascimento <gabriell@bluesoft.com.br>
+Gleb Schukin <gschukin@ptsecurity.com>
 harche <p.harshal@gmail.com>
 Henri Gomez <henri.gomez@gmail.com>
 Hu Keping <hukeping@huawei.com>
@@ -72,6 +76,7 @@ Jonathan Boulle <jonathanboulle@gmail.com>
 Jordan Liggitt <jliggitt@redhat.com>
 Josh Hawn <josh.hawn@docker.com>
 Julien Fernandez <julien.fernandez@gmail.com>
+Ke Xu <leonhartx.k@gmail.com>
 Keerthan Mala <kmala@engineyard.com>
 Kelsey Hightower <kelsey.hightower@gmail.com>
 Kenneth Lim <kennethlimcp@gmail.com>
@@ -94,6 +99,7 @@ moxiegirl <mary@docker.com>
 Nathan Sullivan <nathan@nightsys.net>
 nevermosby <robolwq@qq.com>
 Nghia Tran <tcnghia@gmail.com>
+Nikita Tarasov <nikita@mygento.ru>
 Nuutti Kotivuori <nuutti.kotivuori@poplatek.fi>
 Oilbeater <liumengxinfly@gmail.com>
 Olivier Gambier <olivier@docker.com>
@@ -137,4 +143,5 @@ xg.song <xg.song@venusource.com>
 xiekeyang <xiekeyang@huawei.com>
 Yann ROBERT <yann.robert@anantaplex.fr>
 yuzou <zouyu7@huawei.com>
+zhouhaibing089 <zhouhaibing089@gmail.com>
 姜继忠 <jizhong.jiangjz@alibaba-inc.com>