Update zombie.cfg

Last huge update before V 3.0. Biggest bugs fixed. Silence mode, improved floatspeed, guisprings, zombie-settings with automatic key-backups, servermode-setting, color and grass randomizers, many new and improved tutorials and much more! :D
This is also the last "messy code" update. The menu-code has been reformated from scratch, but needs some bugfixing now.

So this is a very stable menu and by this, the last backup of old code! :D