Merge branch 'bogensch/atm/SCM_dev_BLH_v3' (PR #1350)

Provide aerosol initialization support for SCM runs

Code employs the aerosol specification methods of Lebassi-Habtezion and
Caldwell (2015) to allow for scientifically credible SCM simulations.
Specifically, the user can specify the liquid/ice concentration via the
namelist or specify observed aerosols provided they are included in the
IOP file. Also included in this PR are optional switches to turn off
longwave and shortwave radiation calculations to enable a match of
GCSS idealizations for certain cases. acme_developer tests have been
peformed and this tag is bit-4-bit, as expected.

[BFB]

* bogensch/atm/SCM_dev_BLH_v3:
  bug fix
  compset updates
  fix to generic SCM use case
  first step of PR review modifications
  change comments in file
  bug fix for compilation in full model
  SCM modifications