Added notifications. Closes #101

- Using react-notifications to manage redux state
- Refactored Toast component to be stateless
- Toasts can be stacked
- Cleaned up CSS
- Updated stories

src/reducers/combinedReducer.js

@@ -1,8 +1,10 @@
 import { combineReducers } from 'redux';
 import { routerReducer } from 'react-router-redux';
+import { reducer as notifReducer } from 'redux-notifications';
 import reducers from '.';
 
 export default combineReducers({
   ...reducers,
-  routing: routerReducer
+  notifs: notifReducer,
+  routing: routerReducer,
 });