Call onReset event when Tween resets to beginning

src/Tween.js

@@ -67,6 +67,9 @@
         }
 
         this.reset();
+
+	// add Reset event handler after initial reset is fired
+	this.onReset = config.onReset;
     };
 
     Kinetic.Tween.tweens = {};
@@ -127,6 +130,11 @@
                     that.onFinish();
                 }
             };
+            tween.onReset = function() {
+                if (that._isLastTween(tween) && that.onReset) {
+                    that.onReset();
+                }
+            };
         },
         /**
          * play
@@ -559,4 +567,4 @@
             return c * t / d + b;
         }
     };
-})();
+})();