Python version of the concentration game.
To learn more about the concentration game, visit https://en.wikipedia.org/wiki/Concentration_(game).
A file, example_runs.txt, is provided as an example to show the proper execution of the program.
During the execution of the program, the player can choose between the following two options, depending on how they would like to play the concentration game:
(1) To have a rigorous deck, and thus board, generated automatically for them.
(2) To start with a deck given in a text file (bo1.txt, bo2.txt, bo3.txt, bo4.txt, bo5.txt).