- added next(), reset(), get() and getName() to the NamedLandmarkSource interface so it is traversable without an ImageSource.

- fixed a bug in various ImageSources where an unsigned int was assigned
-1
- improved minor stuff in BobotLandmarkSource
- removed some #using directives in header files
- added a Landmark reader for the MUCT database
- added a landmarkConverter app to convert from MUCT landmarks to DID,
can easily be extended