update german translation
update german translation

BlueTeck/kanboard,Shaxine/kanboard,fguillot/kanboard,patoi/kanboard,kanboard/kanboard,thylo/kanboard,patoi/kanboard,BlueTeck/kanboard,thylo/kanboard,libin/kanboard,Busfreak/kanboard,Busfreak/kanboard,renothing/kanboard,oliviermaridat/kanboard,renothing/kanboard,Busfreak/kanboard,oliviermaridat/kanboard,Shaxine/kanboard,filhocf/kanboard,oliviermaridat/kanboard,fguillot/kanboard,patoi/kanboard,fguillot/kanboard,filhocf/kanboard,stinnux/kanboard,renothing/kanboard,filhocf/kanboard,stinnux/kanboard,thylo/kanboard,stinnux/kanboard,kanboard/kanboard,BlueTeck/kanboard,kanboard/kanboard,Shaxine/kanboard,libin/kanboard