Moving start.php to bootstrap/start.php to collate all bootstrapping files.

Signed-off-by: Ben Corlett <bencorlett@me.com>

artisan

@@ -27,7 +27,7 @@ require __DIR__.'/bootstrap/autoload.php';
 |
 */
 
-$app = require_once __DIR__.'/start.php';
+$app = require_once __DIR__.'/bootstrap/start.php';
 
 $app->boot();
 
@@ -56,4 +56,4 @@ $artisan = Illuminate\Console\Application::start($app);
 |
 */
 
-$artisan->run();
+$artisan->run();