Fix version module paths

Author: vidartf

js/src/_base/Renderable.js

@@ -6,7 +6,7 @@ var $ = require('jquery');
 var THREE = require('three');
 
 var pkgName = require('../../package.json').name;
-var EXTENSION_SPEC_VERSION = require('../../version').EXTENSION_SPEC_VERSION;
+var EXTENSION_SPEC_VERSION = require('../version').EXTENSION_SPEC_VERSION;
 var RendererPool = require('./RendererPool');
 
 var ThreeModel = require('./Three').ThreeModel;

js/src/_base/Three.js

@@ -10,7 +10,7 @@ var Enums = require('./enums');
 
 var utils = require('./utils');
 
-var EXTENSION_SPEC_VERSION = require('../../version').EXTENSION_SPEC_VERSION;
+var EXTENSION_SPEC_VERSION = require('../version').EXTENSION_SPEC_VERSION;
 
 
 /**