Laravel 5.3 upgrade (#189)

* Started move to laravel 5.3

* Started updating login & registration flows for laravel 5.3 update

* Updated app emails to notification system

* Fixed registations bugs and removed email confirmation model

* Fixed large portion of laravel post-upgrade issues

* Fixed and tested LDAP process

app/Exceptions/Handler.php

@@ -87,4 +87,20 @@ class Handler extends ExceptionHandler
         } while ($e = $e->getPrevious());
         return $message;
     }
+
+    /**
+     * Convert an authentication exception into an unauthenticated response.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @param  \Illuminate\Auth\AuthenticationException  $exception
+     * @return \Illuminate\Http\Response
+     */
+    protected function unauthenticated($request, AuthenticationException $exception)
+    {
+        if ($request->expectsJson()) {
+            return response()->json(['error' => 'Unauthenticated.'], 401);
+        }
+
+        return redirect()->guest('login');
+    }
 }