Everything working for Niwot deployment

* All Decagon sensors working, but on hard-coded UART ports
* Realized that splitting up Serial.<command>() into functions does not work, so looking for new ways to generalize Serial connections!
* Have lots of Decagon sensor interfaces based on my attempts to get them working. The new interface is streamlined and *does* work, so will remove the old ones after this commit (but committing to keep these in history in case they are useful)
* Changed the default comms baud rate to 14400 -- one logger having trouble at 57600 but totally OK with all of its sensor comms (including Serial to Decagons at 1200 baud)...