Add separate cron runner that doesn't use proc_open (#1405)

* Add alternative to using the artisan schedule runner

* StyleCI fixes

* Add additional cron time periods

* Style fixes

* Typo

* Update the web cron to use the new system

* Write out JSON for which tasks were run

* Rename cron.php to just cron

app/Events/CronFifteenMinute.php

@@ -0,0 +1,9 @@
+<?php
+
+namespace App\Events;
+
+use App\Contracts\Event;
+
+class CronFifteenMinute extends Event
+{
+}

app/Events/CronFiveMinute.php

@@ -0,0 +1,9 @@
+<?php
+
+namespace App\Events;
+
+use App\Contracts\Event;
+
+class CronFiveMinute extends Event
+{
+}

app/Events/CronThirtyMinute.php

@@ -0,0 +1,9 @@
+<?php
+
+namespace App\Events;
+
+use App\Contracts\Event;
+
+class CronThirtyMinute extends Event
+{
+}