Support for multilanguage sites, Internationalization (I18N)

[mvlcek]

Hello guys .
This plugin is amazing, however, i found 2 bugzya

The first one is that on the "View All Pages (I18N)" menù, when you click to view a page that is translated (and thus has the lang var) the url comes up as: sum.pin?id=gallery?lang=de while the correct would be sum.pin?id=gallery&lang=de. So it has to check if the link has more parameters and append with & instead of ?.

I'll fix this (I'm using fancy urls and you are the first to find that bug).

Another bug, this one really annoys me, is that when you're browsing a page in another language that is not the default, the links doesn't have the lang parameter, so the user is forced to click the language for every link, while the expected behaviour is when the user click a language it should always append the language parameter, even if there's no translated version for the current page, because its up to the i18n loader to determine whether a page doesnt have a translated counterpart and fallback to the default one, but the lang parameter should only stop of being passed when the user clicks the default language, otherwise it should only be passed, and when a page has a translations it's displayed, otherwise it falls back.

It is intentional that there is no language parameter, as the I18N plugin selects the language automatically based on the user's language settings in his browser.

You can let the user permanently (for the session) switch the language by providing links with e.g. ?setlang=de, see my example site http://mvlcek.bplaced.net.

Or you can display a page in a specific language using the parameter ?lang=de (only for that request).