portable air logger

by travishardiman

For the top, I added mounts for a [VOC sensor](https://www.adafruit.com/product/4829). I also added little grates over the sensor holes and labeling to the underside. For the box, I enlarged the USB-C hole slightly to fit the cable I have, added a hole on the opposite side to access the SD card, and added some patterned holes to all four sides. I used the same bottom with no modifications.