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/
If this is a `removeMany` operation it should probably only accept `Phaser.Tween[]` or `Phaser.Group`. If an object stores tweens in another method it could use `removeMany(someObject.myTweens)`, where `myTweens` is an array.