Set shipping address from order in ShipmentSerializer
Add Required, Optional Config
Add additional enable_auto_push config and rename enable_hub to enable_push
Update README
Fix specs
OrderSerializer sets json root to 'carts' if order state is not complete
Merge branch 'master' of github.com:spree/hub_gem
only check token - ignore store id
disable auto-push for orders
removed reformation based attributes
verbosity (print out when push)