German translations for welcome screen, password management and AUP (port forward) (#3716)
German translations for welcome screen, password management and AUP (port forward) (#3716)

* Added German translations for welcome screen, password management and AUP.

* Further revised German translation.

leleuj/cas,fogbeam/cas_mirror,fogbeam/cas_mirror,leleuj/cas,apereo/cas,leleuj/cas,philliprower/cas,apereo/cas,rkorn86/cas,philliprower/cas,apereo/cas,apereo/cas,pdrados/cas,apereo/cas,rkorn86/cas,Jasig/cas,pdrados/cas,leleuj/cas,fogbeam/cas_mirror,leleuj/cas,rkorn86/cas,Jasig/cas,Jasig/cas,pdrados/cas,Jasig/cas,pdrados/cas,philliprower/cas,philliprower/cas,fogbeam/cas_mirror,apereo/cas,fogbeam/cas_mirror,philliprower/cas,pdrados/cas,apereo/cas,rkorn86/cas,philliprower/cas,fogbeam/cas_mirror,leleuj/cas,philliprower/cas,pdrados/cas