Add Recommender System algorithms

[andersonmalheiro]

I want to add some of the algorithms used on recommendation systems. I have completed my graduation recently and in my final paper I wrote a recommender system, an hybrid implementation, using some simple algorithms. I like to share them in your repo if you permit.

[rushter]

Sure. You can create a new folder dedicated to the recommendation systems.

Please follow the same approach that we use in the repo:

1) No external dependencies other than numpy/scipy 2) Simplicity

[andersonmalheiro]

I will need to use pandas to read the datasets. Is a problem? And about that, where can I put the datasets?

[rushter]

We have the datasets module. Instead of pandas, you could use CSV module.

[sumitjain0695]

I will add a recommender system algorithm.