add initial hungarian language support, see comments in hu_HU.po file (#278)

* add itial hungarian language support, see comments in hu_HU.po file that might need feedback

* Update hu_HU.po

"der Svájc" isn't hungarian, fixed now

* added missing trailing " for hu_HU.po

* removed comments that were approved/marked as resolved

* I10n: updated the new pre/postfixes accordingly in hu

* added 'as the crow flies' or 'beeline' translations

* language.html.ep: Fix radio button for hu-HU

---------

Co-authored-by: Birte Kristina Friesel <derf@finalrewind.org>