makedev.sh chgrp's devices if appropriate groups exist;
"make install" now calls scripts/makedev.sh if /dev/isdnctrl0 doesn't exist;
README enhanced with makedev.sh info.
New toplevel Makefile
added xisdnload, xmonisdn, toplevel config for isdnload
Added new interactive configuration utility using lxdialog.
Some adaptions for existing packages.
Some corrections in man pages.