src: Creating file to track current version of ndnSIM (in addition to git tags)

+ AUTHORS file
diff --git a/AUTHORS b/AUTHORS
new file mode 100644
index 0000000..4d180c0
--- /dev/null
+++ b/AUTHORS
@@ -0,0 +1,6 @@
+Alex Afanasyev <alexander.afanasyev@ucla.edu>
+Ilya Moiseenko <iliamo@ucla.edu>
+Lucas <lucas@cs.ucla.edu>
+Cheng Yi <yic@email.arizona.edu>
+Xiaoke Jiang <shock.jiang@gmail.com>
+Saran Tarnoi <sarantarnoi@gmail.com>