Improve status logging
Add --wipe command
Rename --sequential to --foreground
Silence debugging and dbusercheck
Improve reindex -h
Make reporting_loops configurable
Encode all properties in reindex command
Experimental: use exec for invocation

The signal handling introduced into fulltext.Main behaves
oddly when run as a subprocess of the cli. Instead, if we
exec and replace the Python process with the Java one, it
becomes easier to close the process.
Refactor stackAsString to ModelMapper
Set context in FTT for publishing messages