Need troubleshooting guide

[terrillmoore]

Need a guide that guides the developer if things aren't working:

Specifically for the Catena 4410 or Adafruit Feather M0 LoRa:

1. Check the presence of the wire from D6 to DIO1 -- otherwise joins will never complete, and the TX_DATAs that are printed during join will be rare or non-existent.
2. Check that the provisioning data is in catena-lorawan-provisioning/gk_lorawan_keys.project.cpp.
3. Check that the mapping from CPU unique ID is present in MCCI-Catena4410-Arduino-Library/src/lib/gk_WellKnownCpuBindings.cpp
4. Turn on unattended mode in MCCI-Catena4410-Arduino-Library/src/lib/gk_WellKnownCpuBindings.cpp if you're going to run from battery, as it's much easier to debug.