Update to Laravel 5.3

[BREAKING] — REMOVES REMOTE API

A new API will need to be implemented properly using the new Laravel
Passport OAuth2 system. DingoAPI was becoming too unstable and
development wasn’t really moving along enough to continue to rely on it.

resources/views/vendor/notifications/email-plain.blade.php

@@ -0,0 +1,22 @@
+<?php
+
+if (! empty($greeting)) {
+    echo $greeting, "\n\n";
+} else {
+    echo $level == 'error' ? 'Whoops!' : 'Hello!', "\n\n";
+}
+
+if (! empty($introLines)) {
+    echo implode("\n", $introLines), "\n\n";
+}
+
+if (isset($actionText)) {
+    echo "{$actionText}: {$actionUrl}", "\n\n";
+}
+
+if (! empty($outroLines)) {
+    echo implode("\n", $outroLines), "\n\n";
+}
+
+echo 'Regards,', "\n";
+echo config('app.name'), "\n";