Destination data of each account.

Column	Type	Constraint	Description
shop	TEXT	PRIMARY KEY	Shop ID. (shop.username)
account_id	INTEGER		Account ID. (account.id)
index	INTEGER		Index of destinations in each account. 0-origin.
fname	TEXT	NOT NULL	First name.
lname	TEXT	NOT NULL	Last name.
zip_code	TEXT	NOT NULL	Zip code. (ASCII digits and hyphen.)
address1	TEXT	NOT NULL	Address1.
address2	TEXT		Optional. Address2.
city	TEXT	NOT NULL	City.
prefecture	INTEGER	NOT NULL	Prefecture ID. See prefecture.rb.
tel	TEXT	NOT NULL	Telephone number.

CREATE TABLE destination(
shop        TEXT,
account_id  INTEGER,
index       INTEGER,
fname       TEXT    NOT NULL,
lname       TEXT    NOT NULL,
zip_code    TEXT    NOT NULL,
address1    TEXT    NOT NULL,
address2    TEXT,
city        TEXT    NOT NULL,
prefecture  INTEGER NOT NULL,
tel         TEXT    NOT NULL,
PRIMARY KEY(shop, account_id, index));