Check whether all masq commands should write to standard output

[czarte]

We want to check all commands for the reason to write into standrad output. Since if there's no data returned from the command, there shouldn't be anything written to standard output by it: just to standard error if there's a problem.

If you find commands, and there are few, which do not return the data to the UI and writing intor the satandard output, this behaviour should be deleted.