added framework/UpgradeHelper::getMissingTables()
added alias framework/UpgradeHelper::getMissingTables() with existsAllTables()
added upgrade-script.php add loading class PasswordHash
update some corrections of typos in upgrade-sript.php

git-svn-id: svn://isteam.dynxs.de/wb_svn/wb280/branches/2.8.x@1965 98bf1eab-f5fc-0310-a3ed-aac8851f7404