re #9419 Moved the config manager into a class (better modularity)
re #9418 Reduced disk access by storing list of connected devices only when necessary
re #9360 Added logging system -> log config, logging messages
re #9359 Formatted imports
re #9359 Added diskcache dependency, prepared a new thread for periodical data retrieval from the cache
re #9305 Added a python module for USB detection