Added utility classes of three.js (and minor modifications).

threejs/tests/examples/Detector.ts

@@ -0,0 +1,10 @@
+/// <reference path="../../three.d.ts" />
+/// <reference path="../three-tests-setup.ts" />
+
+
+() => {
+	if ( !Detector.canvas || !Detector.webgl || !Detector.workers || !Detector.fileapi ){
+		var errorElement = Detector.getWebGLErrorMessage();
+		Detector.addGetWebGLMessage();
+	}
+}