scalebar, used in plot_glm_test_data doesn't exist

There is an error in the glmtools example notebook named "plot_glm_test_data".  It looks for 'scalebar' in glmtools.plot.mapscale... 

code: from glmtools.plot.mapscale import scale_bar

but!  

No module named 'glmtools.plot.mapscale'

looking at the code confirms this and I don't see a scalebar anywhere either.