loaded webgl.js last to make prefabs/uri.js optional

Author: honzi

index.htm

@@ -10,7 +10,7 @@
 <script src=../common/js/entity.js></script>
 <script src=../common/js/math.js></script>
 <script src=../common/js/time.js></script>
-<script src=../common/js/webgl.js></script>
 <script src=../common/js/prefabs/uri.js></script>
 <script src=../common/js/prefabs/webgl.js></script>
+<script src=../common/js/webgl.js></script>
 <script src=repo.js></script>