Version 1.5 - Reliability update

• Add ThreadedSafetyNet, safeguarding against blocking when logging (important for real-time or near-real-time applications) and duplicating messages (to prevent floods caused by tight loops)
• Add support for filesystem capacity watching in FileLogFunction, to prevent filling up the disk with log messages, which can cause instability for whole system
• LogFunction now has standardized start/stop mechanism, there is no longer a need to do it separately for each log function
• Bump slf4j-api version to 1.7.36