improved: update also timestamp if child path changes + update userModification column

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@2567 1f8fe7d8-47f0-464c-8d0a-336f4953ab05
support for google analytics retargeting tracking code (doubleclick) dc.js

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@2568 1f8fe7d8-47f0-464c-8d0a-336f4953ab05