Second round of automatic flux scaling

- There is now a second round of automatic flux scaling to make sure
that spectra whose angles were very distant from the original
user-chosen (hopefully median) reference angle are rescaled to match the
spectral profile of their closest neighbor spectra (i.e., closest
gr-angle).
- The odcombine step of indivtasks was changed so that it doesn't run if
dispsciences and fluxsciences are BOTH empty instead of just
dispsciences being empty.