Feature/data formats

@moradology agreed. Maybe not ideal, but as you said, this is a fine stopgap until we are able to put something a bit more flexibile in place.  It still might be helpful, if its not already done, to put a comment in each of the scala calculations that indicate the units at a glance, rather than having to look up the associations in django.

@ddohler Yes, that would be ideal, but would take quite a bit more effort -- what's here is ok for now. Good to note for the future though.