Update README.md
Updated to work with the latest
Updated helloworld project.json
Cleanup after remove of Firefly dependency
Added Nowin hosting back and made it the default

Hosting on Kestrel is still available via "k web-kestrel"
Fixed port in README
Merge pull request #8 from akoeplinger/nowin

 Added Nowin hosting back and made it the default
Merge pull request #7 from desdesdes/master

Cleanup after remove of Firefly dependency
Added Websocket demo

- Updated NowinServerFactory to support vnext websockets
- Addd WebSocketMiddleware for kestrel