added additional people missing from AUTHORS file

AUTHORS

@@ -9,3 +9,11 @@ Will Daly <will@edx.org>
 Bethany LaPenta <lapentab@mit.edu>
 Jay Zoldak <jzoldak@edx.org>
 Philippe Chiu <philippe.chiu@gmail.com>
+Marko Seric <marko.seric@math.uzh.ch>
+Feanil Patel <feanil@edx.org>
+Calen Pennington <calen.pennington@gmail.com>
+David Baumgold <david@davidbaumgold.com>
+Kevin Luo <kevluo@edx.org>
+Carson Gee <x@carsongee.com>
+Xavier Antoviaque <xavier@antoviaque.org>
+James Tauber <jtauber@jtauber.com>