Bug fix for issue #94 - Code not checking ADC auto calibration pass/fail.

- Added check in ADC initialization code.
- Passed back as a new ADC status bit (3)
- Added status bit to GDS_TP screen ADC status
- Since difficult to remember what bits mean, ADC status bit info
  added with labels to the auto generated MONITOR_ADC screens.
- Note that this bit is only reported by IOP models.