after work session of Toulouse it was decided to delete old master files as other branch was newer with respect to concepts and properties work after having updated the links. It appears the work could be incomplete but thanks to Jean-Loup Farges this will be cleared.

After this update, the branch beside will be removed

Another ppoint, for the sake of testing we introduced the turtle folder

Signed-off-by: patinusb <pierre.marie.patin@gmail.com>