Replace `print_comment*` methods with a logging class implementation

[sanjayankur31]

https://docs.python.org/3/library/logging.html?highlight=logger

This is quite straightforward to use, and allows easy toggling of debug/warning/error/info etc. levels of verbosity.

Should be a straightforward task too.

[pgleeson]

True, but the same simple scheme is used in NeuroMLlite, OMV...

[sanjayankur31]

I can move them over one by one later, not urgent at all