* Moving Identity seeding to its own class and method.
* Adding tests for AddItem
* Added catalog api controller and functional tests
Added and cleaned up some comments
* Adding integration tests for OrderRepository
* Getting integration test for order working with inmemory db
* Introducing repository and refactoring services.
Changing entities to use int keys everywhere.
* Refactoring application services to live in web project and only reference repositories, not EF contexts.
* Cleaning up implementations
* Moving logic out of CatalogController
Moving entity knowledge out of viewmodels.
* Implementing specification includes better for catalogservice
* Cleaning up and adding specification unit tests
