Returns the text displayed by the input field of the keyboard.

This value can be accessed at any moment, even if user has not yet finished input process.

	var inputText : String = "text";
	private var keyboard : TouchScreenKeyboard;
	// Updates button's text while user is typing
	function OnGUI() {
		if (GUI.Button(Rect(0, 10, 200, 32), inputText))
			keyboard = TouchScreenKeyboard.Open(inputText);
		if (keyboard)
			inputText = keyboard.text;
	}