[readme] Fix small typo.
[files] Get support for sending and retrieving files.
[misc] Examples + linting.
[misc] python-sdk changes.

Summary:
[misc] token_for_code to be consistent with ruby-bindings.

[readme] Fix small typo.

[files] Get support for sending and retrieving files.

[misc] Examples + linting.

[examples] Update the examles.

Test Plan: review the code.

Reviewers: khamidou

Differential Revision: https://review.inboxapp.com/D371
[misc] bunch of random updates.

Summary:
[misc] token_for_code to be consistent with ruby-bindings.

[readme] Fix small typo.

[files] Get support for sending and retrieving files.

[misc] Examples + linting.

[examples] Update the examles.

Test Plan: review the code.

Reviewers: bengotow, khamidou

Reviewed By: khamidou

Differential Revision: https://review.inboxapp.com/D371