Added DS_Store to gitignore
Added DS_Store to gitignore

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