text: Title: Install from requirements.txt
  Body: This is an awesome project and I appreciate your work!
  
  When installing from `pip install -r requirements.txt` the install will fail because in setup.py for django-plotly-dash has the line `import django_plotly_dash as dpd` which requires dash, django, etc. to work. 
  
  See point 6. https://packaging.python.org/guides/single-sourcing-package-version/
  
  > Although this technique is common, beware that it will fail if sample/\_\_init\_\_.py imports packages from install_requires dependencies, which will very likely not be installed yet when setup.py is run.
  
  I was able to get it working by removing django-plotly-dash from the requirements.txt file and installing it separately after everything else. I don't know if you like any other methods proposed for version number, but I thought you would like to know about the issue.
  
  Thank you again for your work!
  
  