reverted pull request #64 -> doesn't work

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@3186 1f8fe7d8-47f0-464c-8d0a-336f4953ab05
document tag snippet & renderlet bugfix in combination with pagespeed

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@3187 1f8fe7d8-47f0-464c-8d0a-336f4953ab05
build auto version ...

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@3188 1f8fe7d8-47f0-464c-8d0a-336f4953ab05