new dataset changes

[Rashmil-1999]

This draft PR introduces a new Dataset class with new read and write methods to hide the underlying mechanism of reading and writing datasets and modularizes the Input/Output Classes. I have left TODO's where we still need to discuss validation mechanisms.

[nunezco2]

The code looks good, but we need a couple of things:

a. Use your code to implement ExampleAnalysis in order to have a sense of how the code would be instantiated.

b. Pass the PEP8 verifier to make sure the formatting is adequate.

[Rashmil-1999]

Yes, I was thinking of implementing it somewhere so we can understand what changes can be made. Just have one question.
Do I have to make changes in the BaseAnalysis?

[Rashmil-1999]

For the PEP8, how to do that? I didn't understand what you meant by "Pass the PEP8 verifier". Did you mean to give PEP8 verifier object? or to pass the PEP8 formatting test successfully?

[nunezco2]

Apologies for the unclear explanation. I should have said "pass the PEP8 formatting test correctly".

[Rashmil-1999]

Oh, okay so is there a command I can run to format it correctly? because my pycharm doesn't auto format for some reason. I tried using the pep8 config file.