Blender exporter: Support non-latin characters. Fixes #4321.

utils/exporters/blender/2.65/scripts/addons/io_mesh_threejs/export_threejs.py

@@ -374,7 +374,7 @@ def rgb2int(rgb):
 # #####################################################
 
 def write_file(fname, content):
-    out = open(fname, "w")
+    out = open(fname, "w", encoding="utf-8")
     out.write(content)
     out.close()