Logging refactoring

Created by: Durman

Fixing problems:

• Logging call was in some another module, not where actual logging was happening. It made such record attributes as modulename or lineno useless.
• Root logger was configured what could conflict with using logging in other add-ons.

New features

• Colored logging =)

How to use logging now?

Inside nodes nothing has changed self.debug(message)

In other modules:

- from sverchok.utils.logging import debug
- debug(message)

# option 1
+ import logging
+ logger = logging.geLogger('sverchok')
+ logger.debug(message)

# option 2
+ from sverchok.utils.sv_logging import sv_logger
+ sv_logger.debug(message)

# option 3
+ from sverchok.utils.sv_logging import get_logger
+ logger = get_logger()
+ logger.debug(message)

For Sverchok extensions first option is especially useful since during reloading event sverchok can reload after an extension. It has sense to add its own sub logger logging.getLogger('sverchok.megapolis')

Preflight checklist

• Code changes complete.
• Manual testing done.