Added new exchange stores.

Added a new exchange store.

- Daily Exchange (Sunabe, Chatan)
- Greenbacks Exchange (Midori-machi, Uruma)
- Torii Exchange (Sobe, Yomitan, Nakagami-gun)

If you know unregistered stores, please let us( @exchangerjp ) know! 😄

EXCHANGER.JP | Find the best currency exchange in Okinawa!

Added Login and Rate posting function

The login function has been added, and you can post money exchange rates from anywhere.

EXCHANGER.JP | Find the best currency exchange in Okinawa!