Cleanup coupling layer

• Get SCAM to work.
• Move to Brian K., naming convention: _mct at end rather than beginning
• Create one module as suggested by Brian K.
• Add header and comments
• Make use of "use only" for modules (unless list is huge)
• Make atm_init just like other inits in coments
• Make sure mct_atm_Export isn't called from outside atm_comp_mct
• Add args and content to _final methods
• Remove noland in lnd_comp_mct, use land_present instead.
• Change names of ocn_comp to camocn_comp
• Give functionality of methods in public statements
• Move seq_fields_mod and seq_fields_indices in lnd_comp_mct to where needed
• Fix spelling mistakes