Update to potree 1.6 and use EPT resources.

Author: connormanning

build/potree/LICENSE

@@ -1,11 +1,11 @@
-
+ 
 ============
 == POTREE ==
 ============
 
 http://potree.org
 
-Copyright (c) 2011-2017, Markus Sch�tz
+Copyright (c) 2011-2017, Markus Schütz
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
@@ -42,21 +42,3 @@ http://plas.io/
 The MIT License (MIT)
 
 Copyright (c) 2014 Uday Verma, uday.karan@gmail.com
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.