changed from copy_file to copy
changed from copy_file to copy

jshoyer/plantcv,AntonSax/plantcv,jshoyer/plantcv,AntonSax/plantcv,danforthcenter/plantcv,danforthcenter/plantcv,danforthcenter/plantcv,stiphyMT/plantcv,stiphyMT/plantcv,stiphyMT/plantcv