Update LICENSE

Only "meaningful" commits and contributors who made changes over the
years have been added.

LICENSE

@@ -1,13 +1,15 @@
 MIT/X Consortium License
 
 © 2006-2014 Anselm R Garbe <anselm@garbe.us>
-© 2010-2012 Connor Lane Smith <cls@lubutu.com>
+© 2006-2008 Sander van Dijk <a.h.vandijk@gmail.com>
+© 2006-2007 Michał Janeczek <janeczek@gmail.com>
+© 2007 Kris Maglione <jg@suckless.org>
 © 2009 Gottox <gottox@s01.de>
 © 2009 Markus Schnalke <meillo@marmaro.de>
 © 2009 Evan Gates <evan.gates@gmail.com>
-© 2006-2008 Sander van Dijk <a dot h dot vandijk at gmail dot com>
-© 2006-2007 Michał Janeczek <janeczek at gmail dot com>
-© 2014-2015 Hiltjo Posthuma <hiltjo@codemadness.org>
+© 2010-2012 Connor Lane Smith <cls@lubutu.com>
+© 2014-2018 Hiltjo Posthuma <hiltjo@codemadness.org>
+© 2015-2018 Quentin Rameau <quinq@fifth.space>
 
 Permission is hereby granted, free of charge, to any person obtaining a
 copy of this software and associated documentation files (the "Software"),