removed old files, working on registers
lotsa test!
register_reserved test
register_model tests, change reserved/read_only class
tests:omni_time, temperature
test:omni_time
display options + tests
calibration offset + tests
clock_adjust/day_of_week + tests
thermo_mode/fan_status + tests
rtp_mode/hold + tests
current_mode/output_status + tests
fix rtp_mode typo
lotsa refactoring, better serialport error recovery
moved temp conversion into module
reworked thermo register initialization
add some basick mocks of serialport
add a gem file, guard-minitest, convert to minitest
merge with reg_factor