Features for python hydra client

[ashwani99]

Currently the Hydra client lacks the following:

• support for classes like hydra:Error, hydra:PartialCollectionView, hydra:Link etc
• linked data fragments
• extensive documentation for classes and functions (docstrings)
• support for python 3(with backward compatibility) and type annotations

It would be nice to add these features as to the client for the Python Client Implementation project. I want to work on this. Can someone please help to get started with it?
@Mec-iS @xadahiya @chrizandr Please comment

[Mec-iS]

support for classes like hydra:Error, hydra:PartialCollectionView, hydra:Link etc

Absolutely. The client has to be updated with most recent specs and use cases as for Heracles

linked data fragments

As in #3

extensive documentation for classes and functions (docstrings)

Absolutely yes.

support for python 3(with backward compatibility) and type annotations

Absolutely yes.

[ashwani99]

@Mec-iS Thanks. I am working on a draft proposal for this. I am planning to club it with the CLI and Falcon port. Can you please help me if this approach is fine or is it too much to work?

[Mec-iS]

Share the draft and you will receive feedback in your google doc.

[Mec-iS]

Merged into #9