Preparing for new release

Phaser/system/easing/Sinusoidal.ts

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+/// <reference path="../../Game.ts" />
+
+/**
+ *	Phaser - Easing
+ *
+ *	@desc 		Based heavily on tween.js by sole (https://github.com/sole/tween.js)
+ *
+ *	@version 	1.0 - 11th January 2013
+ *
+ *	@author 	Richard Davey, TypeScript conversion and Phaser integration. See Phaser.TweenManager for the full tween.js author list
+ */
+
+module Phaser.Easing {
+
+    export class Sinusoidal {
+
+        public static In(k) {
+
+            return 1 - Math.cos(k * Math.PI / 2);
+
+        }
+
+        public static Out(k) {
+
+            return Math.sin(k * Math.PI / 2);
+
+        }
+
+        public static InOut(k) {
+
+            return 0.5 * (1 - Math.cos(Math.PI * k));
+
+        }
+
+    }
+
+}