removing usbFunctionRead because I'm not planning to utilize it.

Expecting it to be simpler and potentially faster to send dump commands and simply provide pointer to ram buffer within usbFunctionSetup.  Saves about 70Bytes of code, so not huge, but whatevs..

AVR Memory Usage
----------------
Device: atmega164a

Program:    2594 bytes (15.8% Full)
(.text + .data + .bootloader)

Data:         53 bytes (5.2% Full)
(.data + .bss + .noinit)

firmware/main.hex

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+:100000000C94E8000C94D1030C9405010C940501A8
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