v0.5.1

• fix handling of OnCalendar timer directive in the drop-in configuration file that reads the periods from the sysconfig
• fix use of --verbose option of fstrim, not available on util-linux < 2.27
• ship manual page of README, also available as 'systemctl help servicename'

v0.5

• sysconfig:
  • change defaults of MUSAGE and DUSAGE for balance task to do less work, with a script to switch from existing unmodified defaults to new ones
  • document systemd.timer syntax
• make balance, scrub, and trim mutually exclusive tasks
• service file updates:
  • delete Install section
• defrag-plugin:
  • switch to python3
  • add alternative shell implementation of the plugin
• installation docs update