Sensor board V6, we'll see if this works....

I updated Jeremy's design for the Sensor Board, revving it to Version 6. Important changes are:

1. Honeywell sensors are now standard
2. Barometry with a commodity Bosch BMP388 chip
3. Added a LIS3DH accelerometer
4. Removed the on-board OAT which we were not using

I got my circuits and stencil from PCBWay and am hoping to build up a few copies as soon as the components and solder paste come in. Wish me luck -- that BMP388 (2mm square LGA-10) is super small! :)