[Koha] Export patrons

[Cab Vinton]

Koha 3.0 has a tool for importing patron data, but no tool for
exporting patron data.

This would come in very handy for making batch edits to large or
large-ish numbers of patrons: Export all data, edit as needed, then
import.

(I believe the Import tool only allows for over-writing the entire
patron record, rather than just any fields that happen to be
non-null.)

If I have things right here, is there a canned report that will
effectively export all the data?

Is there any danger of de-linking circ data with the corresponding
patron record?

Thank you,

Cab Vinton, Director
Sanbornton Public Library
Sanbornton, NH