I think I have things sorted for creating/viewing FITS for
a single file while browsing.

Next up is the mass creation for a directory/file_group, but
I think that will be fairly easy.
Running FITS against a directory tree works synchronously here, but
for whatever reason I'm having trouble when trying to do it using
delayed job. So I'm checkpointing and will try to fix that.
Made Cfs into a module rather than a singleton object and that
seems to have fixed things with delayed job.
Fix a couple bugs with this, but still looking good.
Make development delayed job run more frequently.