Small German update

Cleaning up a misunderstanding I had.
Merge pull request #435 from tstorch/translation-update

Small German update
add showinfo for xorm
Merge branch 'dev' of github.com:gogits/gogs into dev
update specific hook_task, not all
Merge pull request #451 from compressed/hook_task_upd

update specific hook_task, not all
Fix #452