!!! FIRST PLAYABLE BUILD !!!

Keypad:
     Added graphics for the keypad. The code is rudimentary for now, but it'll be tweaked after our first play test.
     Rewrote most of the keypad code so that you now have to input a full code of 3 digits. When you press OK it will check if it's the right code.

Misc:
     Added a new Hotkeys object that loads from the control info scene. When you press 'Escape' it will quit the game.
     Changed some various graphical aspects.

Note:
    Added a 'Close note' button when reading the note. You can't continue until you click it.

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Test play it to make sure everything works!