add staff email export
NOTE: exports all staff emails irregardless of the unrelated can_spam flag
this is for adding staff to a staff-only newsletter, not the public one
don't export placeholder badges
they are typically people who are coming back next year but can't staff this year
also, fix stupid thing I accidentally committed to master
Merge pull request #839 from magfest/staff_email_export

add staff email export (for Madmimi import)