Component adding/removing events are inconsistent

[Epicguru]

The ComponentAdded event is not always raised when I would expect it to when creating a new entity with components:

// Raises event:
var e = world.Create<MyComponent>();
ref var comp = ref e.Get<MyComponent>();
comp.Data = 1234;

// Does not raise event:
var e2 = world.Create(archetype); // archetype includes MyComponent
ref var comp2 = ref e2.Get<MyComponent>();
comp2.Data = 1234;

Additionally, I would also expect world.Destroy(entity) to raise the ComponentRemoved event for all components on that entity, although I can see why this might not be intended.

[Epicguru]

Fixed in #196.