Cart JSON-RPC server
adds ProductVariantImageType
changed total calculations to lifecycle callback
fixed total calculations
adds image type dropdown
adds visibility property to attributes
renamed PaymentMethod -> PaymentGateway path
Order JSON-RPC, general fixes to make RPC/REST APIs working
adds visibility property to attributes
Merge branch 'attribute-visibility'
Merge branch 'master' of github.com:wakeupnow/Sylius
Cart serializer groups
Merge branch 'master' into fulfillment-system