[Gpsbabel-code] Waypoint support for Garmin FIT-format

[g***@awot.fi]

I added waypoint support for Garmin fit files:
http://awot.fi/files/tst/gpsbabel/update/

Updated garmin_fit.cc:
http://awot.fi/files/tst/gpsbabel/update/garmin_fit.cc

Enjoy.

-jukka-