minor cleanups in common.h; updated author info and copyright year
diff --git a/example/example12.cpp b/example/example12.cpp
index 97ba6a8..84b1c35 100644
--- a/example/example12.cpp
+++ b/example/example12.cpp
@@ -1,7 +1,7 @@
 /*
     example/example12.cpp -- overriding virtual functions from Python
 
-    Copyright (c) 2015 Wenzel Jakob <wenzel@inf.ethz.ch>
+    Copyright (c) 2016 Wenzel Jakob <wenzel.jakob@epfl.ch>
 
     All rights reserved. Use of this source code is governed by a
     BSD-style license that can be found in the LICENSE file.