[Xfce-i18n] Polish translation update for trunk

[Benedikt Meurer]

Daichi Kawahata wrote:
> Please try them in your language team (Polish) if possible
> (I don't know it's easy to set though), then give us your reports
> how it works/appears, probably the more Xfce will be wide-spread,
> the more a demand on easy-to-translate will increase, I know it
> may be time to migrate.

Maybe add a page per software to the wiki then? With suggestions and a
software specific howto for Xfce translation. This way it may be easier
for new translators to decide which tool to use.

Just my 0.02€...

Benedikt