Refer to this article: http://bitoftech.net/2014/11/18/getting-started-asp-net-5-mvc-6-web-api-entity-framework-7/
Also, if you clone this repository, make sure you add a wwwroot folder to your solution. This folder is required, but due to the project.json approach, this empty folder cannot be checked in to source control (as far as I can tell)