docs update and sound marker check.

Author: photonstorm

README.md

@@ -106,6 +106,7 @@ Android browser does not support Full Screen.
 * The RandomDataGenerator could be seeded with an array of values. However if the array contained a zero it would stop seeding from that point (thanks @jpcloud @pnstickne #1456)
 * Added extra checks to Sound.play to stop it throwing DOM Exception Error 11 if the `sound.readyState` wasn't set or the sound was invalid. Also wrapped `stop()`` call in a `try catch`.
 * Time.reset would incorrectly reset the `_started` property, now maps it to `Time.time` (thanks @XekeDeath #1467)
+* Fix floating point inaccuracy in Tween easing edge cases (thanks @jounii #1492)
 
 ### Pixi.js 2.2.0 Updates
 

src/sound/Sound.js

@@ -447,7 +447,7 @@ Phaser.Sound.prototype = {
     */
     play: function (marker, position, volume, loop, forceRestart) {
 
-        if (typeof marker === 'undefined') { marker = ''; }
+        if (typeof marker === 'undefined' || marker === false || marker === null) { marker = ''; }
         if (typeof forceRestart === 'undefined') { forceRestart = true; }
 
         if (this.isPlaying && !this.allowMultiple && !forceRestart && !this.override)
@@ -480,10 +480,17 @@ Phaser.Sound.prototype = {
             }
         }
 
-        this.currentMarker = marker;
+        if (marker === '' && Object.keys(this.markers).length > 0)
+        {
+            //  If they didn't specify a marker but this is an audio sprite, 
+            //  we should never play the entire thing
+            return this;
+        }
 
         if (marker !== '')
         {
+            this.currentMarker = marker;
+
             if (this.markers[marker])
             {
                 //  Playing a marker? Then we default to the marker values