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/Events/BaseEvent.php

@@ -2,13 +2,11 @@
 
 namespace App\Events;
 
-use Illuminate\Broadcasting\InteractsWithSockets;
-use Illuminate\Foundation\Events\Dispatchable;
-use Illuminate\Queue\SerializesModels;
+use App\Contracts\Event;
 
-class BaseEvent
+/**
+ * @deprecated Extend App\Contracts\Event directly
+ */
+class BaseEvent extends Event
 {
-    use Dispatchable;
-    use InteractsWithSockets;
-    use SerializesModels;
 }