Input priority IDs working properly for drag events.

Tests/input/touch priority.js

@@ -0,0 +1,28 @@
+/// <reference path="../../Phaser/Game.ts" />
+(function () {
+    var game = new Phaser.Game(this, 'game', 800, 600, init, create, null, render);
+    function init() {
+        //  Using Phasers asset loader we load up a PNG from the assets folder
+        game.loader.addImageFile('atari1', 'assets/sprites/atari130xe.png');
+        game.loader.addImageFile('atari2', 'assets/sprites/atari800xl.png');
+        game.loader.addImageFile('sonic', 'assets/sprites/sonic_havok_sanity.png');
+        game.loader.load();
+    }
+    var atari1;
+    var atari2;
+    var sonic;
+    function create() {
+        atari1 = game.add.sprite(100, 100, 'atari1');
+        atari2 = game.add.sprite(300, 200, 'atari2');
+        sonic = game.add.sprite(400, 300, 'sonic');
+        atari1.input.start(0, false, true);
+        atari2.input.start(1, false, true);
+        sonic.input.start(2, false, true);
+        atari1.input.enableDrag();
+        atari2.input.enableDrag();
+        sonic.input.enableDrag();
+    }
+    function render() {
+        game.input.renderDebugInfo(32, 32);
+    }
+})();