all software used in this robot is available for you to use for any
purpose, improve, and, share those improvements (if you want).
-** arduino
+** robot behavior: arduino
control how the robot gets information from sensors, and moves
its motors.
https://www.arduino.cc/en/Main/Software
-** openscad
+** 3d modeling: openscad
create robot parts!
use this program to view parts inside the "3d-printables"
new ones.
http://www.openscad.org/downloads.html
-** fritzing
+** wiring: fritzing
wire up components!
http://fritzing.org/download/?donation=0
-** 7-zip
+** extract: 7-zip
extract the contents of .tgz files, like the content of this class.
this is needed on MS Windows(tm) only.