Added Matching Pairs game and updated fixed to camera example.

src/core/Game.js

@@ -30,8 +30,8 @@ Phaser.Game = function (width, height, renderer, parent, state, transparent, ant
     parent = parent || '';
     state = state || null;
 
-    if (typeof transparent == 'undefined') { transparent = false; }
-    if (typeof antialias == 'undefined') { antialias = true; }
+    if (typeof transparent === 'undefined') { transparent = false; }
+    if (typeof antialias === 'undefined') { antialias = true; }
 
     /**
     * @property {number} id - Phaser Game ID (for when Pixi supports multiple instances).
@@ -43,8 +43,6 @@ Phaser.Game = function (width, height, renderer, parent, state, transparent, ant
     */
     this.parent = parent;
 
-    //  Do some more intelligent size parsing here, so they can set "100%" for example, maybe pass the scale mode in here too?
-
     /**
     * @property {number} width - The Game width (in pixels).
     */
@@ -372,11 +370,13 @@ Phaser.Game.prototype = {
     */
     setUpRenderer: function () {
 
+        /*
         if (this.device.trident)
         {
-            //  Until Pixi works with IE11
+            //  Pixi WebGL renderer on IE11 doesn't work correctly with masks, if you need them you may want to comment this block out
             this.renderType = Phaser.CANVAS;
         }
+        */
 
         if (this.renderType === Phaser.HEADLESS || this.renderType === Phaser.CANVAS || (this.renderType === Phaser.AUTO && this.device.webGL === false))
         {

src/core/Group.js

@@ -1044,12 +1044,13 @@ Phaser.Group.prototype = {
     * @param {number} returnType - How to return the data from this method. Either Phaser.Group.RETURN_NONE, Phaser.Group.RETURN_TOTAL or Phaser.Group.RETURN_CHILD.
     * @param {function} [callback=null] - Optional function that will be called on each matching child. Each child of the Group will be passed to it as its first parameter.
     * @param {Object} [callbackContext] - The context in which the function should be called (usually 'this').
+    * @return {any} Returns either a numeric total (if RETURN_TOTAL was specified) or the child object.
     */
     iterate: function (key, value, returnType, callback, callbackContext, args) {
 
         if (returnType === Phaser.Group.RETURN_TOTAL && this._container.children.length === 0)
         {
-            return -1;
+            return 0;
         }
 
         if (typeof callback === 'undefined')
@@ -1145,7 +1146,7 @@ Phaser.Group.prototype = {
     * Call this function to find out how many members of the group are alive.
     *
     * @method Phaser.Group#countLiving
-    * @return {number} The number of children flagged as alive. Returns -1 if Group is empty.
+    * @return {number} The number of children flagged as alive.
     */
     countLiving: function () {
 
@@ -1157,7 +1158,7 @@ Phaser.Group.prototype = {
     * Call this function to find out how many members of the group are dead.
     *
     * @method Phaser.Group#countDead
-    * @return {number} The number of children flagged as dead. Returns -1 if Group is empty.
+    * @return {number} The number of children flagged as dead.
     */
     countDead: function () {