Feature Request: Support new websocket interface for uploading

[persmule]

Although closed by Mozilla, Send server has already been forked by Tim Visée at https://gitlab.com/timvisee/send and https://github.com/timvisee/send , with the new websocket interface for uploading.

Now, many new instances have disabled the old http-based upload interface, making this client of yours unable to perform uploading to these instances, while Tim's own client supports the new way. (though downloading protocol remain unchanged)

I personally love this client of yours, because as a python program, it is easy to make it use proxies by setting environment variables like ALL_PROXY or HTTP_PROXY. Would you like to continue improving it?