Add information about snekboard

Snekboard is designed to control Lego robots using Power Functions
motors, servos and switches along with whatever other devices you can
devise. Snekboard runs CircuitPython and Snek.

Signed-off-by: Keith Packard <keithp@keithp.com>

_board/snekboard.md

@@ -0,0 +1,34 @@
+---
+layout: download
+board_id: "snekboard"
+title: "Snekboard Download"
+name: "Snekboard"
+manufacturer: "keithp.com"
+board_url: "https://keithp.com/snek/snekboard"
+board_image: "snekboard.jpg"
+features:
+  - Four 9V Lego-compatible motor controllers
+  - Eight GPIO pins with power and ground
+  - Two NeoPixels
+  - USB
+  - Battery Charger
+---
+
+Snekboard is designed to hook up to Lego Power Functions motors and
+switches, allowing you to build robots out of Lego and control them
+with CircuitPython or the simpler
+[snek programming language](https://keithp.com/snek).
+
+Snekboard is 48mm × 48mm, which is the same size as 6 x 6 Lego studs
+allowing you to build a box out of Lego to hold it attached to your
+Leo design. It uses a single cell lithium polymer battery that fits
+under the board and charges over USB while snekboard is being
+programmed from the host.
+
+## Learn More
+
+* [keithp.com](https://keithp.com/snek/snekboard)
+
+## Contribute
+
+Have some info to add for this board? Edit the source for this page [here](https://github.com/adafruit/circuitpython-org/edit/master/_board/{{ page.board_id }}.md).