Open-discussions-client

-------------

- Remove python 3.5
- Added uid field so open can create social auth objects

-------------

- Added email and email_optin fields (26)

-------------

- Added &34;description&34; field for creating channels (23)

-------------

- Add add_subscriber and remove_subscriber (20)
- Added add_moderator and remove_moderator (19)
- Add add_contributor and remove_contributor (18)

-------------

- Added extra_payload arg to get_token

-------------

- Add create channel API to the client