Feature Request: Configure logging rate

[bheberlein]

Some GPS tracking apps provide settings to configure the logging rate based on a time interval (e.g. create a track point every 1 second) or a distance interval (create a track point when the receiver has traveled more than e.g. 10 ft). This would be a nice feature to add. For me, a time-based logging would be the most useful, but it seems that the current behavior may be distance-based.