Implement data-store extractSounding
Implement data-store extractSounding

Remove unneeded functions and vars from old parseSounding. Remove
database update code from closeHandler. Add skeletons for required
getFilename and setFilename that will manage the file database.

AerodyneLabs/Stratocast,AerodyneLabs/Stratocast,AerodyneLabs/Stratocast,AerodyneLabs/Stratocast,AerodyneLabs/Stratocast