[TASK] Rework the extension for 6.2 only support

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/identity/trunk@83715 735d13b6-9817-0410-8766-e36946ffe9aa
[TASK] Raise the version number to 0.3.0

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/identity/trunk@83718 735d13b6-9817-0410-8766-e36946ffe9aa