- json file ext_sensor_param.json rename to ext_sensor_channels.json

- in ext_sensor_channels.json key names for mapping sensor channels to measured values renamed
- comments in TeststandGUI.bat and new path settings
- edit names for import jsofile ext_sensor_channels.json in climate-lab-gui.py
- edit names for reference to keys in ext_sensor_channels.json
- edit import routine in prototype.py for import of external sensor data

### long term run with step from 25 to 30 °C sucessful ###