New KismetDB version

The database version for the kismetdb log has been updated to version 5. This version changes two significant things:

1. GPS coordinates are now stored as 8-byte REAL (aka double) values in the database, instead of being normalized to integers. This allows Kismet to log with as much precision as the GPS provides, in all situations.
2. The packets and data tables now log GPS speed, altitude, and heading for each packet/data record.

Tools using the kismetdb log should check the db_version field in the KISMET table to determine how to treat coordinates.

For more info, check the kismetdb log docs.