* Upgrading to netcore 2.0
Updating repository to support async options and refactoring to use it.
* Starting work on tracking customer orders feature.
* Cleaning up some bugs
Working on basket view component implementation
* Fixing up styles, especially for basket in header.
* 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
