At some point between 2.0.0-dev.37 and current master we lost dot and slice representations:
The 'dot' representation (in the color/volume example) doesn't display. This is working in the version on the nglviewer.org website, but not in my current master)
The 'slice' representation - working in representation/slice on the main website, but not in current master
At some point between 2.0.0-dev.37 and current master we lost dot and slice representations: