Output is quite verbose - is it possible to add a 'quiet' mode?

[mrseanryan]

Thank you for creating pyvan, it is very useful.

question - is it possible to make the output less verbose:

For example only show warnings or errors ?

[ClimenteA]

A flag to make output less verbose could be added.
I'll keep this open until I get some time for it.

[ClimenteA]

added the verbose flag (checkout readme)