Rename a few variables
Initial UI support for GPS
Very basic GPS support
Comm port settings
GPS altitude
Keep GPS listening during a scan
Store location with each sweep
Installer: Add PySerial
Basic contour map export to Google Earth
Added heat maps
Add box filter to map export
More map renderings
Added colour bar control to maps
Improve map scale tick formatting
Support for legacy GPSd versions <2.91 (i.e. gpsd-4-win)
GPS test dialog and a few fixes
Preserve location time stamps as floating point
Export map data to CSV
Append correct file extension
File CLI saving