• Into a bunch of how-to guides
• Make sure the reference API is correct and complete
• Screenshots / GIFs need some updates (they're 6/7 years old)

Note:

• How to save a plot is one of the most searched things on the website. Let's give them 5-star content :)
  • I know saving static files with Bokeh isn't easy (need some browser driver), let's document that too properly anyway.
  • Include Bokeh and Matplotlib (separate how-to guides I guess)