Also remove many wolf:: that created duplicated namespace specifications

rename all methods accordingly

Use always the new three-pointers constructor, with ‘nullptr’ in the
non-used pointers.

Leave the old code commented for a while

Frame and Feature cases are marked with FIXME for later evaluation

Still need to proceed with the StateBlock pointers which are Raw
pointers now.

getProblem is virtual and overriden in several Base classes.

Need to see how to handle StateBlock removal:

Probably use a weak_ptr up, and remove them from Problem lists with
similar remove() methods.

Cannot use the destructor because it may stay alive for any reason:
then, use remove() as we’ll do in all wolf.

shared L, still many bugs to fix