Merge branch 'end-effector_admittance' into 'devel'

doc/Doxyfile.extra.in

...e/sot/talos_balance/admittance-controller-end-effector.hh

include/sot/talos_balance/admittance-controller.hh

include/sot/talos_balance/base-estimator.hh

python/sot_talos_balance/create_entities_utils.py

...n/sot_talos_balance/test/appli_admittance_end_effector.py

...n/sot_talos_balance/test/appli_admittance_single_joint.py

python/sot_talos_balance/test/script_test_end_effector.py

...on/sot_talos_balance/test/test_admittance_end_effector.py

src/CMakeLists.txt

src/admittance-controller-end-effector.cpp

src/admittance-controller.cpp

src/base-estimator.cpp