beginning of more structured implementation
user exceptions
slave / register implementation begins...
pull in the crc check function
sweet-ass formatter class
pretty printing is pretty
progress.  not a useful message, I know this.  deal.
add pp_type, rename data_tyoe -> mb_type
master now parses config file
rebranding and all that jazz
progress in implemention
command line args over-ride config file settings
logging in master, fix logging setup, add list and kill one-time operations
nicer dump output
lots of structure, CSV output done with simulated output file and data
verbose command line option
fix formatting problem
output file handling
actually open the serial device
now sending modbus queries (not listening for reply yet)