Django 1.5 in a nutshell II

The first part of this tutorial introduced some interesting aspects of Django 1.5. In this second part we are diving deeper into Django features but coding a little bit more, trying always to use the framework properly. Here is the index:

1. Modifying the model.
2. Improving posts administration.
3. Adding commentaries.
4. Tweaking the administrator to manage posts and commentaries.
5. Adding a search function.