Changes of version 2.21

Release 2.21 from 27. August '17

reads and writes Navigon Cruiser (.cruiser) files
reads Columbus Type 2 (.csv) files of Type A and B
writes Garmin Flight Plan (.fpl) files that Flightplan Migrator likes to read
offers an alternative to splitting position lists with too many positions for a file format by reducing the number of positions before saving
supports the Strava Cycling and Running overlays over the OSM Cycle map
uses Thunderforest API Keys to show the OSM Cycle map without "API Key Required" overlay
names the Columbus Professional format now as Columbus Type 1 (.csv)
allows to configure the maps and theme directory for the Offline Edition via Extras/Options...
uses an increased position count for the Google Maps Directions API which now allows for 24 instead of 8 positions per request
writes the log to file as well as to standard out
adjusts limit of Navigon Mobile Navigator for iPhone/iPad URLs to 25 positions
fixes a bug where time was not completed if only the first or the last position had time stamps
fixes missing redraws when zooming since hasFilteredVisibleArea() relied only on the first reduction step
fixes rough tracks when zooming and not having center-on-zooming turned on
fixes a NullPointerException when writing GPX files where tracks have no name