[BUGFIX] TYPO3 6.1 compatibility fix: process events only in the output hook type

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/extbase_hijax/trunk@78827 735d13b6-9817-0410-8766-e36946ffe9aa
* TYPO3 4.5 backward compatibility fix

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/extbase_hijax/trunk@78840 735d13b6-9817-0410-8766-e36946ffe9aa
* implemented thumbnail generation eID script

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/extbase_hijax/trunk@78850 735d13b6-9817-0410-8766-e36946ffe9aa
* delete img hash cache when clearing the whole cache

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/extbase_hijax/trunk@78857 735d13b6-9817-0410-8766-e36946ffe9aa