V3 has got into confusion over settings and live/test modes

[tobiz]

There are 2 issues.

1. Access to settings. With the separation of the gui from the old main code access to settings.'Name' fails in some places. I've tried to fix this by declaring a global settings in flogger3.py passing the gui value of 'settings' in via flogger_run -> flogger_start and initialising a global 'settings' to value passed to flogger_start from 'local_settings'.
2. Live/test mode seems to have got confused! The original idea was that 'test' mode read a file of the days data and reprocessed that. I think that was changed to have a live/test mode held in settings.Flogger_MODE which was intended to just reprocess the database if an error was found (and not read the file of flarm input data). This meant that some of the processing tables doubled in size each re-run, but not an issue if it helped find a fix. This mess needs tidying up!