Fix notifications in UI, added new API for fetching account relationships

app/assets/javascripts/components/actions/notifications.jsx

@@ -1,4 +1,5 @@
 export const NOTIFICATION_DISMISS = 'NOTIFICATION_DISMISS';
+export const NOTIFICATION_CLEAR   = 'NOTIFICATION_CLEAR';
 
 export function dismissNotification(notification) {
   return {
@@ -6,3 +7,9 @@ export function dismissNotification(notification) {
     notification: notification
   };
 };
+
+export function clearNotifications() {
+  return {
+    type: NOTIFICATION_CLEAR
+  };
+};