Update OrderItem
Update Order
Update Order constructor
Fix weird CS
Set order.number as nullable for now
Add specs from CartBundle models and make it pass
Remove denormalized totalItems and totalQuantity
Remove expiresAt, it has moved back to Cart model
Fix expiresAt removing
Add order.state to store all possible states
Fix typo

I should push less
Remove confirmed field from mapping

Use state now
Remove unit price validation

Due to ItemResolver
Merge pull request #31 from winzou/cart-friendly

[WIP] Make Order model Cart friendly