Group: Concurrent Tanks 
Members: Cam, Lucas, and Omar
12/9/19
Concurrent Programming: Final Project
Hours Spent ~80 hours

How To Run Concurrent Tanks Game:
1.) On any terminal, run the command "hostname -i" to get your IP Address for
    the server

2.) Copy the IP Address or write it down somewhere, then run ./TankServer.py
    and enter the IP address 

3.) Have same client then run ./Client.py and enter the same IP Address used to
    start the server when prompted

4.) The other client should then run ./Client.py and enter the IP Address used 
    by the first client (the client that started the server would need to tell
    the other client trying to connect what the IP Address for the server is)

5.) Once both clients hit space bar the game will start. If one client hit's
    escape at the starting screen (the screen before both clients hit escape)
    the server will not crash and allow for someone else to connect however if
    someone disconnects during the actual game play, then the server will
    closes the connections (the client may not quit out on it's own in this
    case)

6.) Keys for movement are the arrow keys for UP, DOWN, LEFT, RIGHT
    respectivley. Use space bar to launch missiles. There are obstacles; neither
    tanks nor missles may go through obstacles.

7.) Once a Tank is hit, we've reached a game over, and the clients may choose
    to play again by hitting space, or quit with ESC. (Sometimes an out of sync
    bug will occur where only a "game over" message will be displayed. This
    will require a full restart of the server and clients.)


TankServer.py: This is the server that is constructed to serve game state data
    to the clients. This handles updates in the form of Memory objects, and
    sends to the other player an updated State object, representing the current
    game state. We cut down on information stored on the server by having it
    only keep track of any new missiles that were created since the last update
    by either player.

Client.py: Client is where our Client interactions with the GUI and Server as 
    well as GUI code lives. After initial setup and connection with the server,
    it enters a loop of processing input from the user (keyboard), querying the
    server for new enemy tank movement and missiles, updating the pygame
    sprites, and finally updating the display shown to the user.

Sprites.py: Here we have all our Sprite functionality. We define Players
    (Tanks), Obstacles on the map, and Missiles shot by the tanks.

Constants.py: Contains constants used by the various files of the project

Messaging.py: Definition of the Memory, Player_pos, and State classes which
    serve as structures to hold data passed between the server and clients.