Renames MQTT topics as subtopics of the ohmpi in config.py; remanes output as sequence in method to load a sequence

This reverts commit 28ae78d8

This reverts commit ccd382ad

Refactors settings.py into config.py and renames msg logger to exec logger as its purpose is to log the execution steps...

Includes the first working version of OhmPi messages logging to mqtt and locally (combined handlers)