sole/tween.js — Issue #25: Tween.chain() should return this
Author: jeromeetienne
Created: 2012-01-14 10:36:45+00:00
State: open

* currently tween.chain doesnt return this
* so it break the chained api

```
new TWEEN.Tween(object3d.scale).to({x: 1.5}, 300)
.chain(othertween)
.start();
```

but currently impossible as .start() will create an error