Fxn formulary_update updates formulary and PRICETABLE stores InvRecs
Fxn formulary_update updates formulary and PRICETABLE stores InvRecs

So the InvRec namedtuple is now implemented as the value in
the dictionary FormularyRecord.PRICETABLE. I added some fields:
NAME, DOSE to make this work.

The function formulary_update now actually updates the formulary
argument towards the end by first testing (using yet another `if`)
whether a price discrepancy exists.

TODO: We need to figure out something better than these nested for
loops.
Perhaps pandas with some broadcasting features might help us out?
Is broadcasting faster than nested for loops?

ehhop/ehhapp-formulary,ehhop/ehhapp-formulary,ehhop/ehhapp-formulary