Add ability to install via npm

[VanDavv]

Hi

Thanks for a great library.

Since most modern projects are now node-based, and it happened that mine uses React so is also based on node, I updated a bit of your code so that I can install it using npm or yarn.

Apart from this change, I think this might be helpful to also add data description, regarding the data that comes through a socket, but I'm not an expert and I don't really understand what those numbers mean.