Code modified to address issue 174:

- Modified counting of cards found during IO mapping to account for
  Contec6464 cards counting at 2 (upper and lower word addresses).
- Code will exit on incorrect card count with message to syslog on
  type of cards not found.
- RCG modified to add REQUIRE_IO_CNT flag for IOP models with H1 or
  L1 IFO designator to automatically invoke this card checking and
  exit on card count error.