Basic functionalities are added.
- Payload validation for both JSON and XML data is added via /validators/
- Working REST-API endpoint added as a flask app
- Error handling is added for the API errors returned to the API caller
- Conversion of payloads to NGSI-LD format added for some of the json payloads
- Return unique URI for saved NGSI in the broker
- Finish conversion for JSON and add converter for XML data