Update LineFollower authored by Markus Klinik's avatar Markus Klinik
This program is based on [this line follower Arduino project](https://create.arduino.cc/projecthub/Zubayer/easiest-line-follower-robot-635bc0).
We translated their source code to SECA and made a couple of improvements.
A full explanation of the robot including discussion can be found in our paper.
- The sensors are read only once at the beginning of the loop
- The conditionals in the loop are mutually exclusive by way of nested if-else
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