[FW] Several changes to account for prototype PCB
[FW] Several changes to account for prototype PCB

- Swap 595 OE pins for data and address bus
- Fixed off-by-one error in SRAM copy code
- Fixed occasional bug with CE1/CE2 pins on Arduino
  which could stay at +5V if they were HIGH before
  switching them to INPUT (high-Z) mode.
- Move status LED blinking code into loop()
- Removed some trailing whitespace in source file.

mkeller0815/VC4000MultiROM