Regenerate list of authors [ci skip]

LICENSE.md

 Copyright holders:
 
+2015--2016    Marco Agnese
 2012--2014    Markus Blatt
 2013--2014    Andreas Buhr
-2014          Ansgar Burchardt
+2014--2016    Ansgar Burchardt
 2013          Benjamin Bykowski
 2011--2014    Andreas Dedner
-2012--2015    Christian Engwer
-2011--2015    Jorrit Fahlke
+2012--2016    Christian Engwer
+2011--2016    Jorrit Fahlke
 2012          Bernd Flemisch
 2013          Christoph Gersbacher
-2014          Carsten Gräser
-2015          Felix Gruber
-2011--2015    Christoph Grüninger
-2013          Dominic Kempf
+2016          Janick Gerstenberger
+2014--2016    Carsten Gräser
+2015--2016    Felix Gruber
+2011--2016    Christoph Grüninger
+2013--2016    Dominic Kempf
 2012          Robert Klöfkorn
 2012--2014    Tobias Malkmus
-2013--2014    Steffen Müthing
-2011--2014    Martin Nolte
-2011--2013    Elias Pipping
-2011--2014    Oliver Sander
+2012--2016    Steffen Müthing
+2011--2016    Martin Nolte
+2011--2016    Elias Pipping
+2011--2016    Oliver Sander
 
 The DUNE library and headers are licensed under version 2 of the GNU
 General Public License (see below), with a special exception for