Appointment Advisor updates

5.50

1. Use Schedule Master 5.10 as software base.

5.51

1. Improve tab control visibility.
2. Miscellaneous bug fixes.

5.52

1. Switch to Plimus for order processing.
2. Make QuickBooks access test more forgiving.
3. Allow exporting jobs to empty QuickBooks database.

5.60

1. Add hourly rate reset to task edit screen.
2. Add SMTP port number to e-mail setup configuration.
3. Improve main tab control balloon help.