Merge branch 'frontend-auth' into 'develop'

wtwui/.gitignore

wtwui/package-lock.json

wtwui/package.json

wtwui/src/App.js

wtwui/src/actions/auth.js

wtwui/src/actions/messages.js

wtwui/src/actions/types.js

wtwui/src/components/Login.js

wtwui/src/components/Navbar.js

wtwui/src/components/Signup..js

wtwui/src/components/common/PrivateRoute.js

wtwui/src/components/layout/Alerts.js

wtwui/src/components/login.component.js

wtwui/src/css/common.css

wtwui/src/reducers/auth.js

wtwui/src/reducers/errors.js

wtwui/src/reducers/index.js

wtwui/src/reducers/messages.js

wtwui/src/store.js