This reverts commit 9fd2003a.

  This reverts commit 1716ac29.

  This reverts commit 46085b6b.

Conflicts:

	unitTesting/python/dynamic_walk.py
	unitTesting/python/feet_follower.py

    - by calling signals through Entity instance members instead of by
      signal('name'),
    - by replacing dynamicRobot member by dynamic,
    - by replacing simu flag by simulation,
    - by replacing robotSimu member by simu
    - by defining members for each operational point:
        AbstractHumanoidRobot.features['right-wrist'] can be accessed by
	AbstractHumanoidRobot.rightWrist for instance.

Previous algorithm was not taking properly into account the
dependencies between data in the dynamic graph such as pointer
signals. Disable it as it is trigger segfaults when exiting the
Python interpreter.