complete kindleboxer task refactor: - no more keeping track of duplicates - a  task that given a dropbox ID, tries to re-email any unsent books for that user
complete kindleboxer task refactor:
- no more keeping track of duplicates
- a  task that given a dropbox ID, tries to re-email any unsent books for that user

stephanie-wang/kindlebox,stephanie-wang/kindlebox,stephanie-wang/kindlebox,stephanie-wang/kindlebox