All cfg-files in config/autostart get executed during startup.
- more appropriate directory name and place
- files are now sorted alphabetically, as promised
- doubles are removed (resulting from identical file names in home and
install tree) since they would only result in files run twice
- scripts with file names prefixed with "_veryfirst_", "_beforesaved_"
or "_aftersaved_" will be run as very first config file, right before
saved.cfg or right after saved.cfg
- all remaining files will be run right before autoexec.cfg
- the directory "config/autostart" will be created, if it doesn't already
exist in the home tree