[TASK] Add basic documentation (fix #52541 )

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/directmail_return_scheduler/trunk@80749 735d13b6-9817-0410-8766-e36946ffe9aa
set version 0.2.0, set dependency

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/directmail_return_scheduler/trunk@80751 735d13b6-9817-0410-8766-e36946ffe9aa