all: update license information

AUTHORS

@@ -3,22 +3,34 @@
 Alex Leverington <alex@ethdev.com>
 Alexandre Van de Sande <alex.vandesande@ethdev.com>
 Bas van Kervel <bas@ethdev.com>
+Christoph Jentzsch <jentzsch.software@gmail.com>
 Daniel A. Nagy <nagy.da@gmail.com>
+Drake Burroughs <wildfyre@hotmail.com>
+Enrique Fynn <enriquefynn@gmail.com>
 Ethan Buchman <ethan@coinculture.info>
 Fabian Vogelsteller <fabian@frozeman.de>
 Felix Lange <fjl@twurst.com>
 Gustav Simonsson <gustav.simonsson@gmail.com>
+Isidoro Ghezzi <isidoro.ghezzi@icloud.com>
 Jae Kwon <jkwon.work@gmail.com>
 Jason Carver <jacarver@linkedin.com>
+Jeff R. Allen <jra@nella.org>
 Jeffrey Wilcke <jeffrey@ethereum.org>
 Joseph Chow <ethereum@outlook.com>
 Kobi Gurkan <kobigurk@gmail.com>
+Lefteris Karapetsas <lefteris@refu.co>
+Leif Jurvetson <leijurv@gmail.com>
 Maran Hidskes <maran.hidskes@gmail.com>
 Marek Kotewicz <marek.kotewicz@gmail.com>
 Matthew Wampler-Doty <matthew.wampler.doty@gmail.com>
 Nick Dodson <silentcicero@outlook.com>
+Peter Pratscher <pratscher@gmail.com>
 Péter Szilágyi <peterke@gmail.com>
+Ramesh Nair <ram@hiddentao.com>
+Ricardo Catalinas Jiménez <r@untroubled.be>
+Rémy Roy <remyroy@remyroy.com>
 Taylor Gerring <taylor.gerring@gmail.com>
 Viktor Trón <viktor.tron@gmail.com>
+Vincent G <caktux@gmail.com>
 Vitalik Buterin <v@buterin.com>
 Zsolt Felföldi <zsfelfoldi@gmail.com>