Notifications fixes (#804)

* Emails not sending #795 #722

* Fix for news items not being sent; refactor some events; check for opt-in #722

* Formatting

* Remove extra parameter

app/Contracts/Event.php

@@ -0,0 +1,12 @@
+<?php
+
+namespace App\Contracts;
+
+use Illuminate\Foundation\Events\Dispatchable;
+use Illuminate\Queue\SerializesModels;
+
+class Event
+{
+    use Dispatchable;
+    use SerializesModels;
+}