Merge branch 'annisa-auth' into 'master'

package.json

src/App.js

src/actions/auth.js

src/actions/types.js

src/components/Home/Home.css

src/components/Home/Home.js

src/components/Navbar/Navbar.css

src/components/Navbar/Navbar.js

src/pages/Login/Login.js

src/pages/SignUp/SignUp.js

src/reducer/auth.js

src/reducer/index.js

src/store.js

src/util/prerender.js