CoAP protocol endpoint for Drogue IoT

This project aims to implement the CoAP endpoint library for the drogue-cloud project. The endpoint would have the ability to facilitate the publishing of data to an HTTP endpoint (device-to-cloud) and send commands to a device from an HTTP endpoint (cloud-to-device). The project would involve implementing the above cloud side features and test them end to end. This project does not focus on implementing a CoAP client.