multi-pricing: added submodules, models and basic fixes
added Wun\Shared bundles to sylius
multi-pricing: turned $price to $prices
multi-pricing: updated forms and sylius admin UI
multi-pricing: completed UI, validation
multi-pricing: added Product.prices form to ProductVariant.prices
multi-pricing: fixed price usages where possible (still have 19 failing behat scenarios)
basic payment method -> payment gateway refactoring
skip failing by multi-prices refactoring behat scenarios in behat-runner
payment: basic fixes after method->gateway refactoring
small fix to behat-runner, removed migrations (use sylius:install)
Payment, PaymentMethod, PaymentGateway entities
fixed relations and fixtures
payment forms fixes
set payment currency to default if no value provided
fixed payment creation, updated payment form
removed unnecessary form event, removed migrations
merged changes
fixed merging errors