Add verbosity option

[manuelpichler]

Short description

It is very common in other CLI Apps, there is a verbosity option. If this is enabled the app prints information to the screen what he does.

Environment

MacOSX 10.6
PEAR

Steps to reproduce

...

Expected behavior

Prints the current file on the screen.

Actual behavior

Doesn`t prints the current file on the screen.

[Synced from PivotalTracker: 'http://www.pivotaltracker.com/story/show/9355937']

[flavius]

This would be really useful.

[ravage84]

Probably related to #94