[qfoldl] Add --quiet option.
[qfoldr] Add --quiet option.
[qbubble] Add --quiet option.
[qfoldl] Do not require double --verbose to print commands.
[qfoldr] Do not require double --verbose to print commands.
[qbubble] Print actions by default. Do not require double --verbose to print commands.
[qfoldl] Make verbosity levels distinguishable in the output.
[qfoldr] Make verbosity levels distinguishable in the output.
[qbubble] Make verbosity levels distinguishable in the output.