Fixed: Details time log report CSV export doesn't honour date format from...

Fixed: Details time log report CSV export doesn't honour date format from settings (patch #2466 by Russell Hind).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@2302 e93f8b46-1217-0410-a6f0-8f06a7374b81