ASP.NET 5 Configuration

http://docs.asp.net/en/latest/fundamentals/configuration.html
http://www.mikesdotnetting.com/article/284/asp-net-5-configuration
http://dotnetliberty.com/index.php/2015/10/18/asp-net-5-mvc6-configuration-in-9-steps/
https://msdn.microsoft.com/en-us/magazine/dn913182.aspx