Carbone-sdk

- Add license and update setup

- **Breaking changes**: the `render` method returns a tuple of 2 elements: the generated report as bytes and a unique report name.
for example before:
python
report_bytes = csdk.render(template_id, json_data)

now:
python
report_bytes, unique_report_name = csdk.render(template_id, json_data)

- Release July 3rd, 2020
- It is possible to interact with the Carbone Render API with the following methods:
- add_template: upload a template and return a templateID
- get_template: return an uploaded template from a templateID
- delete_template: delete a template from a templateID
- render: render a report from a templateID
- generate_template_id: Pre compute the templateID