Make the connections UDP

[ZynoXelek]

Verify that the game uses UDP protocol for communications.
If not, implement it.

This link may be useful to do so : https://wiki.python.org/moin/UdpCommunication

[ZynoXelek]

We have another answer here to confirm :
https://stackoverflow.com/questions/19727606/how-to-differentiate-tcp-udp-when-programming-sockets

[ZynoXelek]

Currently, both our clients and server sockets are using socket.SOCK_STREAM (a.k.a TCP) in their constructor.
We just have to replace it with socket.SOCK_DGRAM (a.k.a UDP) !

[ZynoXelek]

Problem : listen and accept do not exist for UDP sockets.
Need for a central socket (MAINSOCKET) to process clients inputs and share them to the server, which will then use a predefined socket to send data back.
On the client side, may need to have two sockets : one for listening and one for sending. (But not sure it is required)

[ZynoXelek]

Good improvements today.
Yet, still need to stop the dissociation between new connections and old clients.
In the future, only two threads will be necessary : the socket one and the server management one.

[ZynoXelek]

Still need to improve the way our UDP works :
Client side :

• A thread permanently listens for state of the game which is sent periodically after periodically moving players.
• Another thread send inputs only when there is inputs to send. Remove "." input which certainly floods the server a lot !

[ZynoXelek]

Tried to implement two threads on the client side. WIP and need improvements.
Yet periodically moving players is a good improvement and need to be improved. Same for stopping sending "." for no reason and still having feedback from the server !

I'm not sure threads really are necessary on the client side.