Fix AUTHORS

Author: EnTeQuAk

AUTHORS

@@ -1,15 +1,13 @@
 django-babel is written and maintained by the django-babel team and various
 contributors:
 
-Maintainer and Current Project Lead:
-
-- Christopher Lenz <cmlenz@gmail.com>
-
 Contributors:
 
 - Felix Schwarz <felix.schwarz@oss.schwarz.eu>
 - Jeroen Ruigrok van der Werven <asmodai@in-nomine.org>
 - Ramiro Morales <cramm0@gmail.com>
+- Thomas Grainger <tagrain@gmail.com>
+- Christopher Grebs <cg@webshox.org>
 
 django-babel was previously developed under the Copyright of Edgewall Software.
 The following copyright notice holds true for releases before 2013: "Copyright