Renamed chunk.prefab

Signed-off-by: web32 <maximilian.soellner@stf-group.de>
Deleted old Block-Pointers

Signed-off-by: web32 <maximilian.soellner@stf-group.de>
Added the main menu world

Signed-off-by: web32 <maximilian.soellner@stf-group.de>