Create a draft PR for cloud chemistry module

[mattldawson]

Issue Type

Code Clean-up

Issue Description

Create a draft pull request for cloud chemistry so that the code can be reviewed.

Ideas

• duplicate the existing here, here, here
• rename the modules to cloud_aqueous_chemistry, mam_clouds, carma_clouds, with corresponding file names
• start from the Francis's development branch
• things to consider in review
  • missing descriptions for units for variables
  • missing descriptions of functions and function arguments
  • unused variables
  • cryptically named variables
  • dead code blocks
  • potential to break up large code blocks, and introduce reusable/testable functions
  • compare MAM and CARMA code for consistency
  • identify host-model vs aerosol-model portions of the code
  • separate configuration data from algorithms
  • magic numbers

Will this change answers?

Yes

Will you be implementing this yourself?

Yes

[mattldawson]

completed with draft of #5