Add support to optionally specify the paragraph style.

[skerkewitz]

Hey,

I really like your parser. Unfortunately I can not make the text centre in the middle of a label as it always uses the default paragraph style. So I added the option to add a custom paragraph style. Old code should work as before.

Stefan

[sobri909]

Nice :) I've had to work around this one in the past, so this should be handy. Will merge shortly.

[zmian]

any updates on this pr? Could you please merge this?