clarify distinction with OpenStreetMap package

[mpadge]

This should be done, notably in response to @edzer's ropensci review of the package. We just need to work out the best place / places to do it. cc @Robinlovelace @maelle

[maelle]

README + intro vignette?

[Robinlovelace]

Yes to @maelle's suggestions - an easy fix.

[mpadge]

All agreed then. I'll happily volunteer for the harder issue, so it'd be great if one of you could take care of that

[maelle]

I can but from next week :-)

[mpadge]

no rush: i won't be able to anything more until at least the week after anyway. plus it seems we've still got another two reviews review coming.

[maelle]

only one other review, right?