Changes

Setting the value of K_hm to 0 at the non-interactive upper and lower
boundaries. The values of that variable at those levels don't get used
in the code.

This change is meant to keep stats the same between the master branch
and the clubb_ghost_exorcism branch. This changes does not change
the simulations, but yet it is BIT_CHANGING because it changes stat
files output at those levels.

I am committing changes to stats output for cloud_cover, rcm_in_layer,
and z_cloud base owing to the gymnastics it takes to avoid the
ghost point in calculations. These changes are BIT_CHANGING, but
they don't change the answer.