Fix some NullPointers

Signed-off-by: Andre Schweiger <andre.spiele@yahoo.de>
Fix Itemcounter interupting at wrong time

Signed-off-by: Andre Schweiger <andre.spiele@yahoo.de>
Allow multiple Items with the same Name

Signed-off-by: Andre Schweiger <andre.spiele@yahoo.de>
Add New Creeper explosions

Signed-off-by: Andre Schweiger <andre.spiele@yahoo.de>