This patch adds a BOARD option for BUMBLEB to LUFA. It creates a standard
pinout for various perhiperal devices.

In "makefile" for a given LUFA project, change:

    MCU = at90usb162
    BOARD = BUMBLEB
    F_CPU = 16000000

The following pins are mapped to LUFA device functions:

   Bumble-B Pin        AVR Name        LUFA Name
   ------------        --------        ---------
         3                PB4          LEDS_LED1
         4                PB5          LEDS_LED2
         5                PB6          LEDS_LED3
         6                PB7          LEDS_LED4
        14                PD0          JOY_RIGHT
        15                PD1          JOY_DOWN
        16                PD2          JOY_LEFT
        17                PD3          JOY_UP
        18                PD4          JOY_PRESS
        21                PD7          BUTTONS_BUTTON1

The button and joystick controls are active-low, so connect to ground
momentarily to press. The LEDs are active-high of course, so connect the anode
of the LED to the pin (through an appropriate resistor of course), and the
cathode to GND.