* feature: improve memory consumption drastically. Thanks to Morton Jonuschat, http://forge.typo3.org/issues/53946
* feature: improve search speed, do not calculate percentage scores unless required, Thanks to Morton Jonuschat, http://forge.typo3.org/issues/53979
* bugfix: check if filter is set before building the link to reset the filter.
* update version number to 1.6.3

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/ke_search/trunk@83253 735d13b6-9817-0410-8766-e36946ffe9aa