text: Title: Is it possible to add multiple images in a folium popup?
  Body: I tried to add an image to the marker popup in folium and was successful. Following is the code snippet:
  
  ```
  encoded = base64.b64encode(open('test.png', 'rb').read())
  html = ''' <img src="data:image/png;base64,{}">'''.format
  iframe = IFrame(html(encoded.decode('UTF-8')), width=400, height=350)
  popup = folium.Popup(iframe, max_width=400)
  folium.Marker(location,tooltip=html1, popup=popup,icon=folium.Icon(color='red'')).add_to(feature_group)
  ```
  
  Is there a way to add multiple images in the popup like this??
  
  