update resetdb to auto-load sample questions
add basic social auth
add secondary admin any logged in user can access
add all users to the 'users' group to make permissions easier to do
we don't need a separate admin if we can just set is_staff

meh. might be a security problem, but makes for much simpler code.
Either way, we're depending on the security of the django admin.
associate sets with a user
update admin so regular users only see their own sets