Fix laravel 4.2 compatibility

Author: Agontuk

src/controllers/LogViewerController.php

@@ -24,7 +24,7 @@ public function index()
         }
 
         if ($this->request->input('dl')) {
-            return response()->download(LaravelLogViewer::pathToLogFile(base64_decode($this->request->input('dl'))));
+            return $this->download(LaravelLogViewer::pathToLogFile(base64_decode($this->request->input('dl'))));
         } elseif ($this->request->has('del')) {
             app('files')->delete(LaravelLogViewer::pathToLogFile(base64_decode($this->request->input('del'))));
             return $this->redirect($this->request->url());
@@ -47,4 +47,14 @@ private function redirect($to)
 
         return app('redirect')->to($to);
     }
+
+    private function download($data)
+    {
+        if (function_exists('response')) {
+            return response()->download($data);
+        }
+
+        // For laravel 4.2
+        return app('\Illuminate\Support\Facades\Response')->download($data);
+    }
 }