Connecting EspruinoWiFi to computer over WiFi

Just an update on what you can expect:

• The connection to WiFI is 115200 baud - so around 11k bytes a second absolute maximum
  
• There's a few characters overhead when sending data, and then there's a bit of a handshake so Espruino can't be sending data all the time
  
• Websockets add some overhead too
  
• You're sending ~80 bytes of JSON by the look of it? at 60fps that's around 5kB/sec but not including any of the overheads.