closes #45 (doesnt give explaining text for opposite state of toggle switch though, that might be confusing. Instead moved explaining text further away from yes/no toggle, so that it is more intuitively attached to 'publicly share your data?' question
added contact us email to registration page to invite info on errors. #26
chenged VIN/HUD placeholder. closes #41
added progress indicaiton to questionnaire 'Approximately 16 questions left'. closes #38
newusers record expires after 24 h id not validated
refactored change/forgot password so that reset token lives in its own table, and so that can use mongo ttl/expires to set that document to expire after 24h