Castle Dingbot

The Castle Heterodyne Dingbot houses a piece of the Castle Heterodyne intelligence that Agatha recovered in Paris when it was being used to take over Paris. See Professors Foglio and Foglio illustrated history of Agatha Heterodyne, Volumes 15--20.
* http://www.girlgeniusonline.com/comic.php?date=20150810#.X0sjdZNKhR0 p. 75 -- debut of actual Castle Heterodyne intelligence
* http://www.girlgeniusonline.com/comic.php?date=20150831#.X0skIZNKhR0 p. 84 -- first embodiment as a dingbot

General strategy for ball-joints. Insert with flat side aligned with flat part of joint holes, then rotate 90 degrees to hold.

For animated eye, use:
* Circuit Playground Bluefruit -https://www.adafruit.com/product/4333
* TFT Gizmo https://www.adafruit.com/product/4367

Alternate is to use nogizmo_eye.stl
* If using a printer that can stop and change filament, print pupil in different color (black or red) -- M600 on Prusa
* Maybe use white for base, eyeball.
* Alternately, u