doc(README.md): add current year to copyright

Aaron Schlesinger · Aaron Schlesinger · commit 7dfbbf566235 · 2016-03-15T12:58:54.000-07:00
diff --git a/README.md b/README.md
@@ -68,7 +68,7 @@ $ make test
 
 ## License
 
-© 2015 Engine Yard, Inc.
+© 2015, 2016 Engine Yard, Inc.
 
 Licensed under the Apache License, Version 2.0 (the "License"); you may
 not use this file except in compliance with the License. You may obtain
