* Update rl.py

* Update mdp.py

* Minor changed to rl notebook

* removes obsolete Fig dictionary from utils.py

* modified rl notebook according to the new Figure conventions

* removes 'import Fig' and changed the names of Figures

* fixes a small error (by me) in executing the cells in rl notebook

- Fix relative imports in base of is a package or not
- Fix not working notebooks
- Add notebooks to packages sources