text: Title: Unable to get http://storage.insightface.ai/files/models/buffalo_l.zip
  Body: I think http://storage.insightface.ai is down, are there any alternative links for the model from which I can download the model and set it in  `/root/.insightface/models/` manually? 
  
  Code:
  ```
  from insightface.app import FaceAnalysis
  app = FaceAnalysis()
  ```
  
  Output:
  ```
  download_path: /root/.insightface/models/buffalo_l
  Downloading /root/.insightface/models/buffalo_l.zip from http://storage.insightface.ai/files/models/buffalo_l.zip...
  ---------------------------------------------------------------------------
  TimeoutError                              Traceback (most recent call last)
  /usr/local/lib/python3.7/dist-packages/urllib3/connection.py in _new_conn(self)
      158             conn = connection.create_connection(
  --> 159                 (self._dns_host, self.port), self.timeout, **extra_kw)
      160 
  
  23 frames
  TimeoutError: [Errno 110] Connection timed out
  
  During handling of the above exception, another exception occurred:
  
  NewConnectionError                        Traceback (most recent call last)
  NewConnectionError: <urllib3.connection.HTTPConnection object at 0x7fc7b71ce910>: Failed to establish a new connection: [Errno 110] Connection timed out
  
  During handling of the above exception, another exception occurred:
  
  MaxRetryError                             Traceback (most recent call last)
  MaxRetryError: HTTPConnectionPool(host='storage.insightface.ai', port=80): Max retries exceeded with url: /files/models/buffalo_l.zip (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7fc7b71ce910>: Failed to establish a new connection: [Errno 110] Connection timed out'))
  
  During handling of the above exception, another exception occurred:
  
  ConnectionError                           Traceback (most recent call last)
  /usr/local/lib/python3.7/dist-packages/requests/adapters.py in send(self, request, stream, timeout, verify, cert, proxies)
      514                 raise SSLError(e, request=request)
      515 
  --> 516             raise ConnectionError(e, request=request)
      517 
      518         except ClosedPoolError as e:
  
  ConnectionError: HTTPConnectionPool(host='storage.insightface.ai', port=80): Max retries exceeded with url: /files/models/buffalo_l.zip (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7fc7b71ce910>: Failed to establish a new connection: [Errno 110] Connection timed out'))
  ```