Merge pull request #117 from FacerAin/docs

docs: update README.md

Author: aminyazdanpanah

README.md

@@ -179,6 +179,7 @@ You can get realtime information about the transcoding using the following code.
 ```python
 from ffmpeg_streaming import Formats
 import sys
+import datetime
 
 def monitor(ffmpeg, duration, time_, time_left, process):
     """
@@ -398,4 +399,4 @@ I'd love your help in improving, correcting, adding to the specification. Please
 - **[All Contributors](https://github.com/aminyazdanpanah/python-ffmpeg-video-streaming/graphs/contributors)**
 
 ## License
-The MIT License (MIT). See **[License File](https://github.com/aminyazdanpanah/python-ffmpeg-video-streaming/blob/master/LICENSE)** for more information.
+The MIT License (MIT). See **[License File](https://github.com/aminyazdanpanah/python-ffmpeg-video-streaming/blob/master/LICENSE)** for more information.