Implement --help usage message

tumic0 / GPXSee

GPS log file viewer and analyzer with support for GPX, TCX, KML, FIT, IGC, NMEA, SLF, SML, LOC, GPI, GeoJSON and OziExplorer files.

https://www.gpxsee.org

GNU General Public License v3.0

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Closed jidanni closed 11 months ago

jidanni commented 11 months ago

$ gpxsee --help should print a usage message. Afterwards maybe add a man page...

tumic0 commented 11 months ago

Duplicate of #245