Avoid having kernels interleaved.

Instead, store quadrature_size, basis_size and transpose
and have properties giving rows and cols.

Tricky... some grad components depended on the sumfac kernels of the
other directions instead of their input...

This makes the order of 'gradvec' and 'quadvec' consistent with the
other tests.

Note: sumfact_poisson_fastdg_gradvec_nonquadvec does not work!