Add RESTPlus framework / Refactor using Flask-RESTPlus - Create

[JustinChiangkc]

As a ... Developer
I need ... to use Flask-RESTplus to automatically generate documentation
So that ... it's easier for users to use our api

Assumptions:

• ...Create a restplus branch
• ...Create Flask-RESTPlus framework
• ...Add annotation for Swagger Docs
• ...Follow the repo to complete the Flask-RESTplus refactoring
  (https://github.com/nyu-devops/lab-flask-restplus-swagger)
• ...Comment out all the other endpoints and tests

Acceptance Criteria:

Given ...the refactoring is completed
When ...we run the test
Then ...the test for this end point should pass
And ...the HTTP errors return json error messages and not html
And
When ... we access the /apidocs/index.html
Then ... we can see the documentation on the url