Update on TMC-support

Update: My new TMC-receiver arrived yesterday and I was able to work with the first real-world data.
Some minor adjustements where needed:
* GPS auto-detection did not list 57600bps so my tmc-gps was not found. I changed that.
* gps-autodetection would not try to install rxtx before starting. I also changed that.
* I inserted and debugged the support for GNC-type RDS-receivers. all tests before where conducted with Royaltec-type as we had no GNC-testdata. (now e have ;) )
Both types of devices will work now.
* isRXTXInstalled would return false if RXTX was installed not system-wide but with the loadLibrary-hack. That issue was corrected.
* As the import of the TMC location-codes into the OpenStreetMap has not yet begun I added support for an "unknown location", so messages can be seen even if their location was not found in the map.
Speaking of wich, the tool for the TMC-import is making great progress and I may be able to import the TMC-roads (as opposed to segments, points and areas) in a few days.

Marcus