Flask/YOLOv5/PySerialTransfer version

In v1.0, the developed Flask/YOLOv5/PySerialTransfer framework is merged with the original dropletkitchen (https://dropletkitchen.github.io/) fork. Puredata is now replaced as Frontend with Flask, and the backend is now completely in python. Communication to Arduino is via PySerialTransfer, and the yolov5 object detection is integrated.

Pure Data Version endpoint

This is the last planned commit on the PureData based version, a future version will communicate (Raspberry<->Arduino) via PySerialTransfer. Although working, the PureData version is relatively hard to install on various systems.