Fixed lib.tx_pwteaser to work with new namespaced classes

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/pw_teaser/trunk@84831 735d13b6-9817-0410-8766-e36946ffe9aa
Version 3.0.4

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/pw_teaser/trunk@84832 735d13b6-9817-0410-8766-e36946ffe9aa