OWIN Web API: http://www.asp.net/web-api/overview/hosting-aspnet-web-api/use-owin-to-self-host-web-api 用于写API的
OWIN SignalR: http://www.dotnetcurry.com/signalr/915/owin-katana-signalr-web-server 用于写即时通讯的
