histograms are now svg files instead of pngs
histograms are now svg files instead of pngs

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