Updating README.rst copyright dates.

Author: philipn

README.rst

@@ -418,7 +418,7 @@ django-filter has add a ``get_filters()`` classmethod to it's API, so this metho
 License
 -------
 Copyright (c) 2013-2015 Philip Neustrom <philipn@gmail.com>,
-2016 Ryan P Kilby <rpkilby@ncsu.edu>
+2016-2017 Ryan P Kilby <rpkilby@ncsu.edu>
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal