Cleanup exception handling

You're going to love this @joecohens and @jbrooksuk :)

config/exceptions.php

@@ -11,6 +11,25 @@
 
 return [
 
+    /*
+    |--------------------------------------------------------------------------
+    | Exception Transformers
+    |--------------------------------------------------------------------------
+    |
+    | Here are each of the exception transformers setup for your application.
+    |
+    | This allows you to turn your exceptions into other exceptions such as
+    | http exceptions for perfect results when passed to the displayers. Note
+    | that this list is processed in order and subsequent transformers can
+    | still modify the results of previous ones if required.
+    |
+    */
+
+    'transformers' => [
+        'GrahamCampbell\Exceptions\Transformers\CsrfTransformer',
+        'CachetHQ\Cachet\Exceptions\Transformers\ModelNotFoundTransformer'
+    ],
+
     /*
     |--------------------------------------------------------------------------
     | Exception Displayers
@@ -30,6 +49,7 @@ return [
         'GrahamCampbell\Exceptions\Displayers\DebugDisplayer',
         'GrahamCampbell\Exceptions\Displayers\HtmlDisplayer',
         'GrahamCampbell\Exceptions\Displayers\JsonDisplayer',
+        'GrahamCampbell\Exceptions\Displayers\JsonApiDisplayer',
     ],
 
     /*