Merged r11528 from trunk to 2.2-stable (#13343, #13339)

Vietnamese translation for 2.2-stable updated by Minh Thien Nguyen.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/2.2-stable@11531 e93f8b46-1217-0410-a6f0-8f06a7374b81
Merged r11529 from trunk to 2.2-stable (#13343, #13339)

r11529 has some 2.2-stable translation.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/2.2-stable@11532 e93f8b46-1217-0410-a6f0-8f06a7374b81