Add list of which columns need to be displayed.

[dkwiebe]

The thing that I wanted to add was a list of which columns were needed to be displayed, basic filtering options for those columns, and the exported CSV would follow those filtering options.

So that way I could export all Canadian subscriptions shipping info, etc.

[dkwiebe]

@mattpramschufer I added an issue for this. We'd love to see that as well.

[dkwiebe]

Assign to @patriciy