Allow output of raw html with display_html=False option of draw

[bjonnh]

(default is True to keep compatibility)

[patrickfuller]

I'm not sure I understand the point of this option. Can you please explain?

[bjonnh]

I use that to integrate the 3d views in tables or other html tags…

[patrickfuller]

Makes sense - definitely a useful feature.

There's two minor changes to be made:

• Replace if display_html is True: with just if display_html: (PEP8 ref)
• Add a description of the variable in the function docstring under Args:.

I'll merge after that.

[bjonnh]

Yups! Corrected.

[patrickfuller]

Thanks!