[feature] Custom membership reports

[offbyone]

(story-style)

As a member of the convention committee, I would like to be able to customize reports about a subset of convention members in Wellington.

I would like to be able to filter by membership type and checkboxes selected on the member contact page, and deliver that report to an address of my choosing.

I would like the options I can filter by to be presented to me on a web form.

I would like to be able to select the columns in that report from a list of available ones.

I would like these reporting configurations to be stored by Wellington and sent to me on a schedule I choose.