BDY file missing required values/options/keys
Created by: thopri
Add something so that a basic BDY can be generated with all options required by PyNEMO. Currently if an option is missing e.g tide_checker the code will crash.
Options are:
- put in statement to deal with lack of option, (did this with use CMEMS option, bit clunky )
- initialise all required options to false or default (as per NEMO standards)
- add tool to check BDY file is suitable (e.g. displays which options are missing)
- build BDY generator (current favoured option)