First a big thank you for your fantastic efforts and for letting the world participate by open sourcing all that stuff!
But one thing: Please make it easy to generate VIDEO OUTPUT with your libraries!
This is an artificial limitation that I hit with many charting libraries - output generation is html (js) only and people who would like to create moving images have unnecessary problems shoehorning that nice chart library into outputting to a high resolution video.
Please do not limit your designs to one output medium.
Think video, too, THANKS!