* Added Policy Iteration section

* Removed ambiguous test

* Capitalized header

* Added images

* Added section for sequential decision problems

* Added GridMDP editor to create and solve grid-world problems

* Added reference to grid_mdp.py in mdp.ipynb

* Replacing %psource with psource function

* Print matrix to console as well

* fixed Key Error bug in CustomMDP and reordered the return values of T function to be consistent with GridMDP

* removing idea files from git

* Update notebook.py

- remove duplicate psource
- add section headers
- add mdp visualization code

* Update nlp_apps.ipynb

* Update csp.ipynb

* Update mdp.ipynb

* Update games.ipynb

* Update csp.ipynb

* Update mdp.ipynb

* Intro and representation of MDPs in code

* Added Image for MDP

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