Split "Manage documents" permission into create, edit and delete permissions (#12401).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11206 e93f8b46-1217-0410-a6f0-8f06a7374b81
Update locales for new document permissions (#12401).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11207 e93f8b46-1217-0410-a6f0-8f06a7374b81