Great job on the doc. Looks good, except in the "Facial Recognition Overlay" example, the image is not zooming along with the rectangles.

This looks great. As far as this PR goes 💃

That said, some suggestions to make this doc 👌 (not necessarily apart of this PR but probably easy to add on to this)

• organize and spread out imports (HTML to ipynb for bubble, bar, area, box, error bar and quiver-plots #1048 (comment)), like:

import plotly.plotly as py
import plotly.tools as tls

import matplotlib.pyplot as plt
import numpy as np

• The Interactive Facial Recognition Overlays is great but it may be easier to read the example if the code is laid out like the previous examples.