adc interface

update go mod

ftdi stuff mostly

unified scantool driver

ftdi driver for OBDLink cables

ftdi driver for OBDLink cables

move adapter base info to have all types in the main lib

update gocanusb and change to use pointers to a message instead of a …

…interface

split out canusb & canlib to their own repos so others can find and u…

…se them

Better error handling