GBL with correct treatment of rotations

Finished the tracking part. Topics to take care of before removing WIP -> all done from my side, ready for testing

• Validate the functionality of DUT interpolations
• Alignment: Track down the huge memory footprint
• Residuals both in local and global coordinates (different MR in follow up)
• CI-Issues
• Adding volume scattering again
• Something I missed?

I think it should be working now. Anybody with some spare time: Testing is more than welcome