Add Swagger documentation

[jordanagreen]

As a user I need a documented API So that I can understand how to use the API

Assumptions:

• The documentation will be made with Flask-RESTPlus

Acceptance Criteria:

Given ...I want to use the API
When ... I go to the root URL
Then ... I should see automatically generated Swagger documentation

[jordanagreen]

http://flask-restplus.readthedocs.io/en/latest/swagger.html