update changelog


git-svn-id: http://smarty-php.googlecode.com/svn/trunk@4885 9dce5a81-9a42-0410-99e4-3799d3902e7f
update composer file


git-svn-id: http://smarty-php.googlecode.com/svn/trunk@4886 9dce5a81-9a42-0410-99e4-3799d3902e7f
fix date format


git-svn-id: http://smarty-php.googlecode.com/svn/trunk@4887 9dce5a81-9a42-0410-99e4-3799d3902e7f