adding sp and spim to example script...they're not actually used, but its super annoying when they're not available after running the script
import porespy as ps
import matplotlib.pyplot as plt
+import scipy as sp
+import scipy.ndimage as spim
# Generate an image of spheres using the imgen class
im = ps.generators.blobs(shape=[500, 500], porosity=0.7, blobiness=1)
