CompDB5 Update game loop

[macsyd]

Edit game loop so it waits to receive input, executes one step and sends the next frame data, and waits again. The idea is DOOM will receive input from the RF link, execute the next loop with that data, and then send the next frame over RF to be rendered on the ground.

[macsyd]

Game commands will be sent and stored in a buffer on the payload. Once a 'Run' command is received, then all inputs in the buffer will be executed. Then the engine will stop again. See command protocol