changed caching behaviour of forms inside the extension; now this should work on TYPO3 6.1 too and maybe on 6.2; some enhancements in tca.php

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/ab_booking/trunk@77564 735d13b6-9817-0410-8766-e36946ffe9aa
changed cache handling in offerlist, too; ignore offlineproducts in offerlist again

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/ab_booking/trunk@77571 735d13b6-9817-0410-8766-e36946ffe9aa