A jsnes frontend with net play support

[afska]

Hey, I know that this is not really a issue, but I just wanted to thank you for the awesome project and let you know that thanks for the emulator's clean design, I was able to implement two-players Net Play over network on my jsnes frontend!

The project is open source, it's deployed at https://rodri042.github.io/nestation and here is a topic on nesdev explaining the details.

The jsnes-web's FrameTimer was working bad on my 120hz screen (it was running the games really fast) so I had to implement it by myself here -> https://github.com/rodri042/nestation/blob/master/src/emulator/FrameTimer.js

Maybe you can use the timer or other parts as well on jsnes-web. Cheers!