[Proposal] Verbosity added to Console\Command wrappers

[robclancy]

There is no simply way I see with Symfony's Console components to only write if --verbose is set. I have had to do a heap of if ($this->verbosity() > 1) to get the effect myself. So I propose you add a second variable to your wrapper methods in Console\Command... as in info($string), error($string) etc. Simply add an optional second variable to only output if a certain verbosity is set.

I have already done it on an App I am making that uses your console component.
https://github.com/bigelephant/xf-console/blob/master/src/BigElephant/XfConsole/Command.php

[taylorotwell]

You can override the methods to achieve this if you want.