Czech translation for 2.5-stable updated by Karel Pičman (#16453)

git-svn-id: http://svn.redmine.org/redmine/trunk@13015 e93f8b46-1217-0410-a6f0-8f06a7374b81
Czech translation for trunk updated by Karel Pičman (#16453)

git-svn-id: http://svn.redmine.org/redmine/trunk@13016 e93f8b46-1217-0410-a6f0-8f06a7374b81