[scoping] limit to netCDF standards or basic netCDF

[dvalters]

Follow up from meeting:

A first approach will be to check if the netCDF file is CF-compliant, then we could have a nice mapping of folder structure to the time dimension

Here's a very rough example of how this might look structure-wise:

[dvalters@helmsdale sampledirmnt]$ tree --dirsfirst
.
├── pressure
│   ├── t1
│   │   ├── t1_p.png
│   │   └── t1_p.txt
│   ├── t2
│   │   ├── t2_p.png
│   │   └── t2_p.txt
│   ├── t3
│   ├── t4
│   ├── t5
│   └── variable_attrs.txt
├── dimension_metadata.txt
└── global_attrs.txt