Python Support

With help from swagger-codegen[0], Pulp's API schema can be used to generate bindings in many different languages.

I was able to GET the schema in JSON format from http://localhost:8000/api/v3/docs/api.json and then uploaded the JSON file to swagger editor[1]. I then clicked on "Generate Client" and selected "Python". This produced a ZIP archive that contained a python package with the bindings and documentation.

The hosted solution is backed by a Java application called swagger-codegen[2]. The goal of this task is to use swagger-codegen to generate a package called pulpcore-api-bindings and upload it to PyPI. The version should be the same as the version of pulpcore that was used to generate the bindings.

[0] https://swagger.io/swagger-codegen/
[1] http://editor.swagger.io/#/
[2] https://github.com/swagger-api/swagger-codegen