[Geany-i18n] String freeze for Geany 1.34

[scootergrisen]

Could someone make a "Submit translation" section on 
https://www.geany.org/Contribute/Translators and move the instructions 
inside it to make it clear the ways to submit translations.

E-mail says:
 > I'd be very happy if you could send a patch, a pull request or single
 > file with translation to either the geany-i18n mailing list or direct
 > to me within the next two weeks so we can include it to the next
 > release. Deadline will be 2018-12-15 24:00h CET.

Website says:
 > send the file to the translation mailing list or directly to Frank
 > Lanitz

And fix the https://www.geany.org/Support/I18N link on 
https://i18n.geany.org/ that is blank.