Update NEWS, AUTHORS.

AUTHORS

@@ -130,5 +130,11 @@ dzhuang <dzhuang.scut@gmail.com>
 Antoine Pietri <antoine.pietri1@gmail.com>
 Taras Postument <trane9991@gmail.com>
 Earl Chew <earl_chew@yahoo.com>
+Daniel Andersson <dandersson@users.noreply.github.com>
+Fabian Grünbichler <fabian.gruenbichler@student.tuwien.ac.at>
+Kenneth Lareau <kenneth.lareau@couchbase.com>
+Antoine R. Dumont (@ardumont) <antoine.romain.dumont@gmail.com>
+Alistair Broomhead <alistair.broomhead@gmail.com>
+Marcel Schnirring <mschnirring@marcel-schnirring.de>
 
 If you contributed but are missing from this list, please send me an e-mail.

NEWS

@@ -1,4 +1,4 @@
-0.18.7	UNRELEASED
+0.19.0	UNRELEASED
 
  BUG FIXES
 
@@ -24,6 +24,12 @@
     rather than a ``generate_pack_contents`` function for
     performance reasons. (Jelmer Vernooij)
 
+  * Dulwich now uses urllib3 internally for HTTP requests.
+    The `opener` argument to `dulwich.client.HttpGitClient` that took a
+    `urllib2` opener instance has been replaced by a `pool_manager` argument
+    that takes a `urllib3` pool manager instance.
+    (Daniel Andersson)
+
 0.18.6	2017-11-11
 
  BUG FIXES