Objects after coming to rest are stuck in that state.

Please include an option to prevent objects from going to sleep. This issue got me stuck for quite a while and I ended up having to apply an impulse of 0 to all objects to wake them up.

var impusle = new THREE.Vector3;
impusle.set( 0, 0, 0 );
object.applyCentralImpulse( impusle);