Can handle or not the Tiago's wheels
Remove useless python imports
Fix SEGV when deleting the robot from the pool.
Remove timestep_

HolonomicProjection takes wheels into account.
Add entity Odometry
Mark some classes as deprecated.
Remove computation of base velocity.
Fix SEGV.
Update tests/appli.py (include wheel velocity calculation)

Fix problems to run on Tiago Steel with gripper and SoT.

Fix numerous wrong links:
 - urdf names
 - steel specific robot
Add robot prologue.
Fix PLIST

Initial commit of the package provoding SoT for Tiago.