Create im_server.py
Create im_server.py

simple TCP server for 1 to 1 communication with another client. Very limited and needs improvement.
Currently, Protocol is:
 1: Enter IP address of the machine in use (to act as server)
 2: Listen and await connection from client.
 3: Once connected:
     3.1: Connection Successful message printed.
     3.2: Receive message from client.
     3.3: Send message to client.
     3.4: Repeat 3.2-3.3 as required.
     3.5: To end connection: send message: END
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