Made the knife not repairable.

Closes #69 (hehehehe)

src/main/java/de/ellpeck/actuallyadditions/mod/items/ItemKnife.java

@@ -24,6 +24,7 @@ public class ItemKnife extends ItemBase{
         this.setMaxDamage(100);
         this.setMaxStackSize(1);
         this.setContainerItem(this);
+        this.setNoRepair();
     }
 
     @Override