v0.3

Good improvements since v0.2; some highlights below.

• Various script tidy-up.
• Add --skipgps for testing without a GPS
• Add --loglevel to change script runtime verbosity while keeping/adding --debug and --verbose to automatically enter loglevel 2 and 1 respectively.
• Renamed the --disablechannelswitching arg to --nomanagement and have it prevent interface management but also channel switching.
• Implemented --google to be specified with --exportcsv to split contents into multiple CSV files with a limit of 2000 data points each.
• GPS related activity moved to its own Class for better organisation.
• Database Class given a better initialisation routine.
• Other goodies