Added more refs.
+ Added basic project + app.
+ Added steps.txt file for supporting the practice.
+ Updated workflow in slides.
Settup DB.
Added PriceHistory model.
Added historical_data app in installed apps.
+ Registered price history model in admin site.
+ Added and applied first migration.
+ Updated steps.txt
Adde requeriments.txt file.
+ Added img folder in slides.
+ Added southvsdjango slide.