Changed translation file pattern for german. Scripted replaces:
=> "'%value%'   TO   => "Der Wert
"'%value%'  TO  "The input

Similar things are absolutely needed for the other languages, too.
"Small" fixes
Another fix to Zend\Validate\EmailAddress key ressource
Updated all translation-keys to fix the current standard of the en_EN Ressource. Updated all translations accordingly. There are threee @todo notations for which i am unsure about a possible better translation.
Merge branch 'hotfix/3439'

Close #3439
Fixes #3409
Merge branch 'master' of git://github.com/manuakasam/zf2 into hotfix/3425
Merge branch 'hotfix/3425' into develop

Forward port #3425