Add Depth Limited search and And-Or Graph search in search.ipynb

[CharuChhimpa]

@ad71 and @MrDupin, Do we need to add Depth Limited search and And-Or graph search in the python notebook?

[ad71]

Yes we need notebook sections for these. You can work on DLS if you like. I'm currently working on the And-Or graph search.

[CharuChhimpa]

@ad71, I am also adding iterative deepening search. That is fine?

[ad71]

Sure, thanks!

[CharuChhimpa]

@norvig, @MrDupin and @ad71, Can you please review my pr?

[ad71]

It would be better if a collaborator reviewed it, I'm just another student :)

[CharuChhimpa]

@norvig and @delaray, Can you review my pr please?

[CharuChhimpa]

@norvig, I have added one more pr adding iterative deepening search in search.ipynb. Can you please see that?