Add songs, organize into sets, print setlists.
###Global###
- global/nextUserID
- global/nextBandID
- global/nextListID
###Auth###
- auth/<auth_key> = <user_id>
###Signup###
- signup/<signup_token> = {email: <email>, password: <hashed>}
###User###
- user/<user_id>/email = email address
- user/<user_id>/password = hashed password
- user/<user_id>/bands = set of <band_id>s
- user/email/<email_address> = <user_id>
user/<user_id>/auth = if user is logged it. their current <auth_key>(not used. we currently allow a user to log in multiple places)
###Band###
- band/<band_id>/name = band name
- band/<band_id>/users = set of <user_id>s
- band/<band_id>/admins = set of <user_id>s which are admins for the band
- band/<band_id>/songs = set of <song_id>s
- band/<band_id>/lists = set of <list_id>s
###List###
- list/<list_id>/name = list name
- list/<list_id>/length = number of minutes total
- list/<list_id>/songs = a list of "123:songname" strings