Update de.yml for Devise 3.3.0

This string has been added in https://github.com/plataformatec/devise/commit/571dead19ba436599a7ab0744705a1438d32031f
Merge commit 'refs/pull/91/head' of github.com:tigrish/devise-i18n
Reformat de.yml
Version bump to 0.11.0
Regenerate gemspec for version 0.11.0