* marked icon
* multiple selection
* hidden flag for repository
* background color of package list black always
* consolidation of package list - identical packages are
reduced to the latest one
* Moved tlSystemPaths into lay namespace where it belongs
* Doc updates
* New command line switch -y and -yd for unattended installation
* Download URL's can be relative to salt.mine URL
* KLAYOUT_HOME environment variable to make ~/.klayout configurable
* Better error messages on XML parser on file/stream read errors
(specifically from http/https)