Bump Phaser version to 2.7.8

Author: samme

package.json

@@ -1,7 +1,7 @@
 {
   "name": "phaser-ce",
-  "version": "2.7.7",
-  "release": "2017-04-20",
+  "version": "2.7.8",
+  "release": "2017-05-07",
   "description": "Phaser CE (Community Edition) is a fast, free and fun HTML5 Game Framework for Desktop and Mobile web browsers.",
   "author": "Richard Davey <rdavey@gmail.com> (http://www.photonstorm.com)",
   "logo": "https://raw.github.com/photonstorm/phaser-ce/master/phaser-logo-small.png",

src/Phaser.js

@@ -14,7 +14,7 @@ var Phaser = Phaser || {    // jshint ignore:line
     * @constant Phaser.VERSION
     * @type {string}
     */
-    VERSION: '2.7.7',
+    VERSION: '2.7.8',
 
     /**
     * An array of Phaser game instances.