Fix Touch events on Firefox and Chrome

Fix Touch events by subscribing to both mouse and touch events when
available.
Navigators fires only touch or mouse event so no performance
degradation.

raphael.core.js

@@ -2692,19 +2692,31 @@
     stopTouch = function () {
         return this.originalEvent.stopPropagation();
     },
+    getEventPosition = function (e) {
+        var scrollY = g.doc.documentElement.scrollTop || g.doc.body.scrollTop,
+            scrollX = g.doc.documentElement.scrollLeft || g.doc.body.scrollLeft;
+
+        return {
+            x: e.clientX + scrollX,
+            y: e.clientY + scrollY
+        };
+    },
     addEvent = (function () {
         if (g.doc.addEventListener) {
             return function (obj, type, fn, element) {
-                var realName = supportsTouch && touchMap[type] ? touchMap[type] : type,
-                    f = function (e) {
-                        var scrollY = g.doc.documentElement.scrollTop || g.doc.body.scrollTop,
-                            scrollX = g.doc.documentElement.scrollLeft || g.doc.body.scrollLeft,
-                            x = e.clientX + scrollX,
-                            y = e.clientY + scrollY;
-                    if (supportsTouch && touchMap[has](type)) {
+                var f = function (e) {
+                    var pos = getEventPosition(e);
+                    return fn.call(element, e, pos.x, pos.y);
+                };
+                obj.addEventListener(type, f, false);
+
+                if (supportsTouch && touchMap[type]) {
+                    var _f = function (e) {
+                        var pos = getEventPosition(e),
+                            olde = e;
+
                         for (var i = 0, ii = e.targetTouches && e.targetTouches.length; i < ii; i++) {
                             if (e.targetTouches[i].target == obj) {
-                                var olde = e;
                                 e = e.targetTouches[i];
                                 e.originalEvent = olde;
                                 e.preventDefault = preventTouch;
@@ -2712,12 +2724,19 @@
                                 break;
                             }
                         }
-                    }
-                    return fn.call(element, e, x, y);
-                };
-                obj.addEventListener(realName, f, false);
+
+                        return fn.call(element, e, pos.x, pos.y);
+                    };
+
+                    obj.addEventListener(touchMap[type], _f, false);
+                }
+
                 return function () {
-                    obj.removeEventListener(realName, f, false);
+                    obj.removeEventListener(type, f, false);
+
+                    if (supportsTouch && touchMap[type])
+                        obj.removeEventListener(touchMap[type], f, false);
+
                     return true;
                 };
             };