Added Tween.restart and stopped the manager adding the same tween twice

Author: photonstorm

v3/src/tween/manager/TweenManager.js

@@ -160,6 +160,11 @@ var TweenManager = new Class({
 
     makeActive: function (tween)
     {
+        if (this._add.indexOf(tween) !== -1 || this._active.indexOf(tween) !== -1)
+        {
+            return;
+        }
+
         var idx = this._pending.indexOf(tween);
 
         if (idx !== -1)
@@ -172,6 +177,8 @@ var TweenManager = new Class({
         tween.state = TWEEN_CONST.PENDING_ADD;
 
         this._toProcess++;
+
+        return this;
     },
 
     setGlobalTimeScale: require('./components/SetGlobalTimeScale'),

v3/src/tween/tween/Tween.js

@@ -131,6 +131,12 @@ var Tween = new Class({
         return this;
     },
 
+    restart: function ()
+    {
+        this.stop();
+        this.play();
+    },
+
     calcDuration: require('./components/CalcDuration'),
     init: require('./components/Init'),
     nextState: require('./components/NextState'),

v3/src/tween/tween/components/Play.js

@@ -10,6 +10,7 @@ var Play = function (resetFromTimeline)
     {
         this.init();
         this.parent.makeActive(this);
+        resetFromTimeline = true;
     }
 
     var onStart = this.callbacks.onStart;
@@ -46,7 +47,7 @@ var Play = function (resetFromTimeline)
     }
     else
     {
-        this.resetTweenData(false);
+        this.resetTweenData(resetFromTimeline);
 
         this.state = TWEEN_CONST.ACTIVE;