Fix multisensor board layout

- Add separate power supply for analog circuitry to
maintain voltage requirement.
- Fix data line connection on MIB bus
- Remove incorrect pin headers
Touches on gsm_module
Update version numbers
Update revision number to 2.0 in multi_sensor
Fix screw hole positions to match polycase and be symmetrical

Actual screw spacing should be 3.744" not 3.8".
Update part descriptions for automatic BOM generation
Add 3 pin headers for serial and turbine connector

Update RJ11 to different compatible model since the other was
backordered.