MemoryMania initial implementation

[acpabst]

Blocked by #2 Implement a basic version of MemoryMania. This will be a limited set of functionality

• button generation - randomly select a character from the following [A, B, X, Y, L, R]
• once the random button has been generation, create a timer which will timeout the game
• accept input from the Xbox controller. print the button pressed to the terminal
• if the timer runs out, or the button press is wrong, end the game with a losing message
• if the button press is correct, end the game with a winning message Add this basic app to the yocto image

DoD

• loading the newest image onto the raspberry pi and running the app should result in the above functionality

[acpabst]

The basic game logic is done! This commit of the app: #x2190839 implements

• generating a random character
• getting input from either the keyboard or the Xbox controller, depending on the status of a debug flag
• checking the input against the current sequence, ending the game if the player was incorrect
• a timer which will end the game if the player takes too long to respond

Things still to do:

• the characters generated are not actually random yet, but the predictability is quite useful when testing and debugging, so it's really a feature at this point. I will update it in a future revision, after integration with the aesdchar driver
• the random characters selected print to the terminal, and stay there, meaning that the game is not really a memory game right now!
• general clean up. There are a lot of print messages everywhere, but again, those will continue to be useful as I continue to write this code The above will be covered by #6