Http Client Functions

[raphael-goetz]

Add the Http Client (& websocket) as well as fetch functionallity

[nicosammito]

@raphael-goetz Could you give some more details on how you are planning to implement all these functionalities on the runtime?

[raphael-goetz]

We did discuss to take the JavaScript fetch function as a reference for this.
You would just give in a HTTP_REQUEST and would get a HTTP_RESPONSE back. As for the implementation: ist just a http client.

In theory there's also no problem on the runtime doing streaming via web socket but this feature also could be an action.