TouchFilter.cs

using UnityEngine;
using TouchScript;
using UnityEngine.EventSystems;
using System.Reflection;

public class TouchFilter : MonoBehaviour
{
	void OnEnable()
	{
		TouchManager.Instance.TouchesBegan += touchEventOccured;
	}

	void OnDisable()
	{
		if(TouchManager.Instance != null)
			TouchManager.Instance.TouchesBegan -= touchEventOccured;
	}

	void touchEventOccured(object sender, TouchEventArgs eventArgs) 
	{
		ITouchManager gesture = sender as ITouchManager;

		// to make sure this works for mouse input and touch-devices, starting from -1 (mouse) loop through  
		// each 'touch' in Input.touches and pass in the id to 'IsPointerOverEventSystemObject'
		// LINK http://forum.unity3d.com/threads/ispointerovereventsystemobject-always-returns-false-on-mobile.265372/
		for(int i=-1, il=Input.touches.Length; i<il; i++)
		{
			if (EventSystem.current.IsPointerOverGameObject(i))
			{
				foreach (ITouch touchPoint in eventArgs.Touches)
				{
					// hacking internals...
					MethodInfo method = gesture.GetType().GetMethod("CancelTouch", BindingFlags.Instance | BindingFlags.NonPublic);
					method.Invoke(gesture, new object[] { touchPoint.Id });
				}
				return;
			}
		}
	}
}