Improved Python script logging and other fixes

• All Python scripts now produce system logs.
• lib/ups.py: Improved stability when running in parallel with ups-cli

Home automation support

• New Bluetooth communication service bt-daemon for controlling Bluetooth enabled accessories.
• Improved serial console serial-cli.py now supports multi-threading and better exception handling.
• Improved exception handling in the UPS service ups.py.
• Basic homebridge automation scripts.

Configurable ping test

bin/monitor: Added a parameter for configuring the number of ping attempts

Monitor ping test

bin/monitor:

• Implemented ping test for checking arbitrary IP addresses.

Monitor system reboot

bin/monitor:

• Send a warning message if the system has been rebooted.

Monitor and log updates

bin/monitor:

• Added DNS resolver test
• Use --secure option for speedtest-cli

lib/log.sh: Added time zone to log timestamps

UPS command line interface

Implemented UPS command line interface script under sbin/ups-cli.

Python 3 compatibility

Updated the Python scripts bin/serial, lib/ups.py and lib/cleanup.py for compatibility with Python 3.x.

General purpose backup script and Mac OS compatibility

lib/config.sh: Mac OS compatibility and ability to reference config variables from within other config variables using the '$' prefix
bin/backup-files: New general purpose rsync wrapper script for backing-up files from/to local/remote sources/destinations
bin/monitor: Display CPU temperature

Migrate to msmtp

Migrated the server monitor to msmtp for sending mail.