Update license headers

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

public.php

@@ -7,8 +7,10 @@
  * @author Joas Schilling <coding@schilljs.com>
  * @author Jörn Friedrich Dreyer <jfd@butonic.de>
  * @author Lukas Reschke <lukas@statuscode.ch>
+ * @author Maxence Lange <maxence@artificial-owl.com>
  * @author Morris Jobke <hey@morrisjobke.de>
  * @author Robin Appelman <robin@icewind.nl>
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
  * @author Thomas Müller <thomas.mueller@tmit.eu>
  * @author Vincent Petry <pvince81@owncloud.com>
  *
@@ -24,7 +26,7 @@
  * GNU Affero General Public License for more details.
  *
  * You should have received a copy of the GNU Affero General Public License, version 3,
- * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
  *
  */