Docs update.

Author: photonstorm

README.md

@@ -369,6 +369,7 @@ Version 2.4 - "Katar" - in dev
 * PIXI.Graphics was calling Polygon.flatten in its drawShape call, causing the original Polygon object to internally change. It now takes a clone of the polygon and only flattens that (#1779)
 * Tween.generateData didn't set a default value for the `frameRate` parameter if undefined, causing an infinite loop (thanks @rblopes #1782 #1785)
 * Fixed the Pixelate filter, changing the `dimensions` uniform to a 2f and removing un-needed vecs from the fragment src. Also fixed the size getter and added sizeX and sizeY getters/setters (#1780)
+* Tween.to and Tween.from can now accept `null` as the ease parameter value. If `null` it will use the default tween, as per the documentation (thanks @nkovacs #1817)
 
 For changes in previous releases please see the extensive [Version History](https://github.com/photonstorm/phaser/blob/master/CHANGELOG.md).