Various scripts for different functions

Nicole Portas 15476b1570 Adding mesh_to_step script hai 2 meses
exif_change_date.py d02326aa9e improvements hai 2 meses
mesh_to_step.py 15476b1570 Adding mesh_to_step script hai 2 meses
repack_slicer.sh f1dd315015 adding useful scripts hai 2 meses