features added: possible selection between several teacher plugins of common type; modified/completed StringInputTeacher and PoseInputTeacher; added FloatInputTeacher
minor modifications in terms of writing yaml files
YamlManager routines 'updateFiled()' and 'writeFile' implemented
minor modifications in FieldUpdater.py
PoseTeachInHandleTeacher() implemented
tf broadcaster implemented
Rearanged repo, changed to catkin, added rqt interface
Updated widget to be implemented inside of teacher.
Example for PoseStamped
Added Combobox for choosing TeacherPlugin, if more then one exists.
Support for saving data.
Added std_msgs/String teacher.