Update tapcontrol.js

//////////////////////////////////////////////////////////////
// TapControl.js
// Penelope iPhone Tutorial
//
// TapControl handles the control scheme in which Penelope is
// driven by a single finger. When the player touches the screen,
// Penelope will move toward the finger. The player can also
// use two fingers to do pinching and twisting gestures to do
// camera zooming and rotation. 
//////////////////////////////////////////////////////////////