Added Garmin Communicator API from http://www.garmindeveloper.com/web-device/garmin-communicator-plugin/ .
Fixed bug in Garmin API.
Switched to own API files.
Show Garmin status even if browser is not supported (otherwise the user
wouldn't have a clue).
Enable "Send to GPS" button again.
Merge pull request #151 from mbirth/364-send-to-gps-failed-fix

364 send to gps failed fix; fixes #364