Z class: remove static shift done

Signed-off-by: LK <LK@uni>
Z class: remove distortion  done (incl. error propagation using 1-norm)

Signed-off-by: LK <LK@uni>
Edi class: reduced number of attributes, added methods, esp. get/set_<value> ones

Signed-off-by: LK <LK@uni>