Added ReST documentation

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/jh_pwcomments_feed/trunk@83416 735d13b6-9817-0410-8766-e36946ffe9aa
Removed old documentation and updated ChangeLog

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/jh_pwcomments_feed/trunk@83417 735d13b6-9817-0410-8766-e36946ffe9aa