Add client-side html selectors for replay-file selection
Add getRecursiveDirContents()
Refactoring
Use directory contents for replay info
Less specific names for replay selectors

They are not just for dates and times, but also user-save directories.
Fix: correct id for tag zones selector
Add extra level to replay selectors
Groundwork for start-replay functionality
Restore mountLucyNas.sh, which is useful after all
Fixes in time stamp for age computation + Fix user save: write events
Remove obsolete updateLabels()
Show reader-event time in web interface