django: Create app "blog"

As in the previous commit this code has been automatically generated.
django: Add the first model
django: Register `BlogPost` so that it appers in the admin screen
django: Display blog posts title and timestamp

This way, we won't see entries such as "BlogPost object".
django: Add first dummy view

This view only creates a fake post and displays it, but at least we can now
get a grasp at how the app is structured: Models, Views and Templates.
django: Make use of strings instead of importing the views

Django supports strings so that you don't even need that import.