Update NEWS, AUTHORS.

AUTHORS

@@ -3,6 +3,7 @@ James Westby <jw+debian@jameswestby.net>
 John Carr <john.carr@unrouted.co.uk>
 Dave Borowitz <dborowitz@google.com>
 Chris Eberle <eberle1080@gmail.com>
+"milki" <milki@rescomp.berkeley.edu>
 
 Hervé Cauwelier <herve@itaapy.com> wrote the original tutorial.
 

NEWS

@@ -27,6 +27,8 @@
   * Support passing None for empty tree in changes_from_tree.
     (Kevin Watters)
 
+  * Support fetching empty repository in client. (milki, #1060462)
+
  IMPROVEMENTS:
 
   * Add optional honor_filemode flag to build_index_from_tree.