*** 3d-printables
the parts of the robot that are 3d-printed are in this directory.
use openscad to open the parts in this directory.
+*** build-stages
+ all the wiring diagrams and arduino code live in this directory.
+
+ under this directory, there is one subdirectory for each
+ build stage.
+ each build stage is prefixed with a letter to make it appear in
+ order.
+ for example, =a_serial= contains the first build stage.