Add description 9.i for alternate folder structure

[oscarhogervorst]

I loved the guide, it helped me a lot. However I was stuck quite some time on 9.i
I did not have my settings.py in the proj/proj/ folder but proj/proj/config/ leading to a hard to track error.
Maybe you could clarify in 9.1 that you should use the path to where settings.py (and celery.py) are located instead of just putting 'yourproject' In my case changing the value to yourproject.config fixed it.