Rename Transform -> Transform_ in idl files

  - in order to avoid conflict name with the future Transform python class.
Implement python class Transform.
Add method transform in python class Quaternion.
Add interface method getObjectPosition in Robot interface.
Add interface method to get waypoint of a path.
Fix method Robot.setTranslationBounds in robot.py.
Test path id when accessing a path.
Cosmetic change

  - reindent and remove trailing white spaces.