Move Whoops code into its proper place and implement ajax support for json files

index.php

@@ -15,19 +15,6 @@ use Grav\Common\Grav;
 // Register the auto-loader.
 $loader = require_once $autoload;
 
-// Setup Whoops error handler
-$whoops = new \Whoops\Run;
-
-$error_page = new \Whoops\Handler\PrettyPageHandler;
-$error_page->setPageTitle('Crikey! There was an error...');
-$error_page->setEditor('sublime');
-$error_page->addResourcePath(__DIR__ .'/system/assets');
-$error_page->addCustomCss('whoops.css');
-
-$whoops->pushHandler($error_page);
-$whoops->register();
-
-
 if (!ini_get('date.timezone')) {
     date_default_timezone_set('UTC');
 }