Added fully-fully noco code to potential generator and charge density part. Proper handling of spin dimension for density and potential still missing

This compiler is a bit picky about some fortran features. In particular it does not like
dummy arguments to be used as dimensions before they are declared...

specify -DCPP_OLDINTEL to deactivate parts of the code that did
not compile; mainly the order of USE statements was changed or
ONLY was added to avoid confusion of the compiler.