new kurt_freespace package

- calc_freespace() taken from k-freespace.cc in the kurt software
- SICK_Check_range() taken from kurt_sick_scanner.cc in the kurt
  software
- autonomous_behave() taken from kurt_behave.cc in the kurt software
- adapted everything to ROS units and laser message
Kurt Freespace Bugfix

SICK_Check_range uses the old Kurt coordinate system, switching x and y
to convert between Kurt and ROS
updated stack.xml and manifest.xml descriptions
kurt_freespace: more realistic values
Rename kurt_freespace -> uos_freespace
Merge remote-tracking branch 'apps/freespace' into hydro