Editor: Adding GPLv3 license.

LICENSE

@@ -1,6 +1,6 @@
 The MIT License
 
-Copyright (c) 2010-2012 Three.js authors.
+Copyright (c) 2010-2012 three.js authors
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

editor/LICENSE

@@ -0,0 +1,16 @@
+GNU General Public License v3
+
+Copyright (C) 2012 three.js authors
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.