feature/dq_oauth

[Ksteeds]

OAuth.

Still requires testing and integration into DQ.py file.

[Ksteeds]

Requires testing.

Broad design complete.

[lsimonsen]

As discussed @Ksteeds here is the propose re-working of the folder structure for the DataQuery interface:

• macrosynergy
  • dataquery
    • api.py
      • Interface class
    • auth.py
      • OAuth class for OAuth authentication
      • CertAuth class for certificate authentication

To keep back-ward compatibility we can rework the current DataQuery interface file dq.py into:

import warnings
from ..dataquery.api import Interface as DataQueryInterface

warnings.warn(
    "DataQueryInterface has been moved to macrosynergy.dataquery.api"
   DeprecationWArning,
   stacklevel=2
)

__all__ = ["DataQueryInterface"]

This should insure old code will still work.

[lsimonsen]

In addition we need to move cert_auth.py and oauth.py into a single file named auth.py to keep it simple.