Unmounts this object from it's parent object in the scenegraph.
unMount ()
Returns * Returns this on success or false on failure.
Unmount an entity from another entity
// Create a couple of entities and give them ids
var entity1 = new IgeEntity().id('entity1'),
entity2 = new IgeEntity().id('entity2');
// Mount entity2 to entity1
entity2.mount(entity1);
// Now unmount entity2 from entity1
entity2.unMount();