Add a config file for export

[Addalin]

@scaperex It is very essential to know what parameters were chosen in the GUI before doing export (from reconstruction tab).
can you try to write a config file that contains the following parameters:

• [ ] image type: hdr or jpg
• [ ] applied radiometric calibration: true or false
• [ ] ignore date extrinsic: true or false
• [ ] gamma correction: true or false
• [ ] path to ROI (if it was saved)