update make_apex_cubes with some better docs, more diagnostic plots (& plot options) and "lines" -> "window" (in one case)
update make_apex_cubes with some better docs, more diagnostic plots (&
plot options) and "lines" -> "window" (in one case)

adamginsburg/APEX_CMZ_H2CO,keflavich/APEX_CMZ_H2CO,keflavich/APEX_CMZ_H2CO,adamginsburg/APEX_CMZ_H2CO