Format suggestion.

[ehrenfeu]

I've rearranged the existing three CSV files into something that should be robust and easy to parse as a suggestion for issue #5.

Rationale:

• Items with different semantics should not be mixed in one file. In other words: don't put the "section names" of the different regions into the same CSV file, as every parser will have to guess if this is a line describing an actual chart sheet, or if it is a section header.
• Different regions go into differen sub-directories.
• Every directory has an index file.
• All other files in a directory have a consistent syntax.

All of these points are particularly targeted towards writing a simple validator that could be used to check the syntax of those files and test them for meaningful content (e.g. valid coordinates, etc.).

Please have a look at this format and let me know what you think!

[ehrenfeu]

To see how the CSV files actually look like with the GitHub renderer, just have a look at this branch in my repository:

https://github.com/ehrenfeu/oseam_chart-sheet-properties/tree/separate_sections/IHO_PUB_S-11