Swap special codes 'F' and 'FF'

For consistency with the standard code (and our own documentation on the
Chemistry Updates google doc), we now use 'F' as the flag for HAC
photolysis and 'FF' as the flag for the dicarbonyls simulation. Note that
the same change is required in readchem.F

Signed-off-by: Jenny Fisher <jennyf@uow.edu.au>
Remove duplicates of drydep species

Several DRYXXXX species were defined twice, increasing the amount of
memory and space needed for the CSPEC array.

Signed-off-by: Jenny Fisher <jennyf@uow.edu.au>
Turn off passive tracers

To make space for additional species, make all passive tracers and
associated reactions dead ("D").

Signed-off-by: Jenny Fisher <jennyf@uow.edu.au>
Make DHDN active

Allows us to track it with the ANs in planeflight_mod even if we choose
not to include it as a tracer.

Signed-off-by: Jenny Fisher <jennyf@uow.edu.au>
Update acetaldehyde photolysis product yields

See http://wiki.seas.harvard.edu/geos-chem/index.php/FAST-JX_v7.0_photolysis_mechanism#Acetaldehyde_photolysis
Note that associated updates to ratj.d and jv_spec.dat have already been
applied.

Signed-off-by: Jenny Fisher <jennyf@uow.edu.au>