* Package::isValid() checks if the Package is valid, e.g. all required files and dirs are present * add methods to PackageStructure which return just the required bits svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=690102
svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=676612
svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=676505