add reference to ducks modular redux proposal to README.md
add reference to ducks modular redux proposal to README.md

knowbody/redux-react-router-example-app,Yanagiya/SOS_HAKATHON_TEMLATE,Yanagiya/SOS_HAKATHON_TEMLATE,JeremyJonas/redux-react-router-example-app,knowbody/redux-react-router-example-app,JeremyJonas/redux-react-router-example-app