+integrate weights array into t_cdnvalJob type

(at the moment this is broken)

The old test is renamed to SiFilmPlotXML.

+ bugfix for density slice generation in main/cdngen.F90

1. This fixes the problem from the previous commit.
2. Also in this commit: move qmat array to cdn/qal_21.f90 as it is used nowhere else.

Note: This cleanup includes the inclusion of the qvlay array
into the t_regionCharges type. This breaks the program logic
for the noco%l_noco case as it is created inside a certain
spin loop but should be created outside this loop. It is not
yet clear how this will be solved. Probably the regCharges
type should just move to cdngen and the arrays in it should
have full spin dimensions.

...also in this commit: remove count variable for q vectors in ForceTheorem type in XML Schema