Adds size/orientation support

GLEssentials/iOS/ViewController.m

@@ -37,6 +37,7 @@
     self.preferredFramesPerSecond = 60;
     
     [self setupGL];
+    game.windowSize = self.view.bounds.size;
 }
 
 - (void)dealloc{
@@ -64,6 +65,10 @@
     // Dispose of any resources that can be recreated.
 }
 
+-(void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation{
+    game.windowSize = self.view.bounds.size;
+}
+
 - (void)setupGL{
     [EAGLContext setCurrentContext:self.context];
     game = [[Game alloc] init];