Added TweenManager#removeFrom method

Allows the removal of all Tweens from a specific object, array of objects or group of objects.

Demo: http://jsfiddle.net/lewster32/L3u3gp5k/
`removeFrom` is confusing - who is the "from"? `removeMany/removeCollection` (because `removeAll` is taken) or "overloading" `removeAll` may be more appropriate.