added support for Lorentz dispersive material

Signed-off-by: Thorsten Liebig <Thorsten.Liebig@gmx.de>
new: support debye dispersive material

Signed-off-by: Thorsten Liebig <Thorsten.Liebig@gmx.de>
ports: save U/I filenames and return ref-impedance

Signed-off-by: Thorsten Liebig <Thorsten.Liebig@gmx.de>
ports: new waveguide ports

Signed-off-by: Thorsten Liebig <Thorsten.Liebig@gmx.de>
ports: new switch direction and refractive index for waveguide ports

Signed-off-by: Thorsten Liebig <Thorsten.Liebig@gmx.de>
Tutorials: use new waveguide ports

Signed-off-by: Thorsten Liebig <Thorsten.Liebig@gmx.de>
bug fix: operator extensions copy constructor is missing copy for active flag

Signed-off-by: Thorsten Liebig <Thorsten.Liebig@gmx.de>
Operator: use internal function to delete inactive extensions

Signed-off-by: Thorsten Liebig <Thorsten.Liebig@gmx.de>
Operator: allow to choose time stepping method

Signed-off-by: Thorsten Liebig <Thorsten.Liebig@gmx.de>
matlab doc: missing dump statistics flag

Signed-off-by: Thorsten Liebig <Thorsten.Liebig@gmx.de>
Cylindrical MultiGrid Operator: record level of multi grid

Signed-off-by: Thorsten Liebig <Thorsten.Liebig@gmx.de>
Operator: add optional range to DumpPEC2File to allow for separated dump in case of a multi grid cylindrical operator

Signed-off-by: Thorsten Liebig <Thorsten.Liebig@gmx.de>
matlab: waveguide ports don't need mesh info, only drawing unit

Signed-off-by: Thorsten Liebig <Thorsten.Liebig@gmx.de>
fix in conducting sheet extension, missing initialization

Signed-off-by: Thorsten Liebig <Thorsten.Liebig@gmx.de>