Polish translation guidelines for Wikia extensions

Thanks for the vote of confidence, but I wouldn't dare adding these on any 'official' page on translatewiki.net. These guidelines are somewhat debatable and should be restricted to Wikia extension messages only.

Seeing as I'm currently in process of reviewing and correcting all Wikia messages, I figured I might as well, for consistency's sake, add these guidelines as a reminder of what has been translated how.

Portal pages are not by any means "official", and it's enough to add a note with what you've just said here: don't worry! It's worse not to be able to find info like this because it's hidden in a user page you'd never think of. ;-)

I'm going to expand the guidelines and afterwards I'll consider organizing them on a more accessible page for others to be able to find them. Thanks for the suggestion.