Added utils.ipynb

[SkAdilina]

utils.ipynb now contains Queue, FIFOQueue and PriorityQueue

[apb7]

@MrDupin and @SkAdilina : Do we actually require a notebook for utilities? We use notebooks to explain and visualize various ideas and concepts of AI whereas utilities help us to do so. They do not actually represent a concept. Please correct me if I am wrong!
Thanks!

[SkAdilina]

@apb7 I am definitely not an expert on this, so I won't be able to correct you. However, this is where I saw that Queue is yet to be included in the Notebook, so I went ahead and added it.

[apb7]

Okay, let's wait for @norvig and @MrDupin then :)

[antmarakis]

Hmm, you are right that it seems like we want a notebook for utils with the Queue in the README. I personally think such a notebook is not necessary, so maybe we want to remove Queue from the list of algorithms, or add a 'Not Needed' mark on the 'Notebook' section.

It is up to @norvig though.

[norvig]

I don't think we need a notebook for utilities, including Queue. I think we can just import the code.

[antmarakis]

I am afraid since Mr. Norvig said we don't need a notebook for utilities, I have to close this.

Thanks for the work though. Keep it up!