Counter Modified to use WebSockets

This is a modified version of the Elmish counter sample illustrating the use of WebSockets in a Fable app.

Client

Uses Fable.Import.Browser.WebSocket type.

Server

Uses fable-import-ws to fire WebSockets events from an Express node HTTP server, all from Fable-generated code.

Build and running the sample

1. Install shared sample dependencies: ./build.sh on *nix or build on Windows
2. cd src
3. Start Express server: yarn run start
4. open http://localhost:8080