fix for curve in cylindrical coordinates and multigrids

Signed-off-by: Thorsten Liebig <Thorsten.Liebig@gmx.de>
hdf5 dump reader: remember original mesh indices

Signed-off-by: Thorsten Liebig <Thorsten.Liebig@gmx.de>
Added support for background material in CSXCAD

Signed-off-by: Thorsten Liebig <Thorsten.Liebig@gmx.de>
matlab: calcPort calculates port inc/ref/acc power

Signed-off-by: Thorsten Liebig <Thorsten.Liebig@gmx.de>
Tutorials: use new calcPort power calculation

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