match_name() should output the column borderline

[jdhoffa]

r2dii.data has a series of sector code classification datafiles, each of which has a column borderline. This flag is FALSE if the sector classification code perfectly aligns with a 2dii sector, and TRUE if the sector may include one, but might not.

This would be a good column to output, as it can be used to determine the coverage of the matching easily.

This PR should inlude an article explaining borderline

[maurolepore]

Should we include this in the upcoming release?

[jdhoffa]

I think it wouldn't hurt.

[jdhoffa]

It should be as simple as adding it to a call to select(). If it seems like it will take longer than ~10min, then I would say forget about it, and proceed with the release

[maurolepore]

I agree, the change should be quick and safe. What might take longer is the article. If you want it in the same PR, I’d appreciate your help. Else, we can show the feature in the blog post that announces the release.

[jdhoffa]

Absolutely, I can help today if you'd like to work on it together