add placeholder docu in ReST-format. TBD soon

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/ab_booking/trunk@79011 735d13b6-9817-0410-8766-e36946ffe9aa
Introduction of the new manual

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/ab_booking/trunk@79015 735d13b6-9817-0410-8766-e36946ffe9aa