emscripten support?

[bitc]

Would be awesome if we could use Remotery to profile C/C++ emscripten games.

Challenges:

1. Websocket server. We can't start a websocket server from an emscripten game. One workaround is to use a native websocket server as a proxy. Another solution is have emscripten directly send the data to another browser tab (postMessage)

2. Timer accuracy. Browsers have recently reduced the accuracy of performance.now because of security and privacy reasons. I have heard that soon high-accuracy will be re-enabled, and some browsers allow to manually enable it through settings.