soft-code nr of variables
soft-code nr of variables

will extend kernel example to spin polarized case

bast/xcfun,robertodr/xcfun,dftlibs/xcfun,robertodr/xcfun,bast/xcfun,robertodr/xcfun,dftlibs/xcfun,bast/xcfun,bast/xcfun,robertodr/xcfun,dftlibs/xcfun,dftlibs/xcfun