The script library is now a part of mangos-zero server repository.

Signed-off-by: Daniel S. Reichenbach <daniel@kogitoapp.com>
Added link to release 0.18.1 of mangos-zero server.

Starting from version 0.18.1, mangos-zero server now includes scripts by
default, and this repository is deprecated.

Signed-off-by: Daniel S. Reichenbach <daniel@kogitoapp.com>