GPS::BBBikeGPS::MountedDevice: support for Garmin mountpoint on Ubuntu/Fedora
Strassen::GPX: fallbackname option

The new fallbackname option is used if no name for a trk/wpt/rte could
be found.

In the implementation both the libxml2 and twig functions have a
$get_name function which deals with unified name/fallbackname/<name>
handling.

strassen-gpx.t has tests for the new fallback option, and more tests
for <rte>.
bbbikegooglemap: use fallbackname
warning fix in fragezeichen2org
plotting support for "* x1,y1 x2,y2"
data update