Merged r11553 from trunk to 2.2-stable (#13398, #13391)

Czech translation for 2.2-stable updated by Karel Pičman.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/2.2-stable@11557 e93f8b46-1217-0410-a6f0-8f06a7374b81