Feature/logger

[RYNEQ]

print messages are converted to logger messages
we now have --log CLI parameter which defaults to debug and prints all messages

• Obvious error and warning messages are in correct level.
• Packet details are in debug level
• decoratives, informatives and Morse codes are in info level (Cleanup and enhancements are required)

Also current message format is %(message)s so only the message itself is logged; we need to categorize sections/modules/functions and decide for a appropriate message format (time, section, level, message, ...)

[RYNEQ]

Should we change the --log {critical,error,warning,info,debug} behavior to something like -v for warning, -vv for info and -vvv for debug ?
This seems simpler

[xhdix]

-vvv seems more idiomatic, thanks a lot!

[RYNEQ]

-vvv seems more idiomatic, thanks a lot!

Now -v, -vv and -vvv are available for warinig, info, debug levels and default verbosity is error