Mark sequence as not repairable (#79)

src/main/java/binnie/genetics/item/ItemSequence.java

@@ -116,4 +116,9 @@ public class ItemSequence extends Item implements IItemAnalysable, IItemChargabl
     public int getCharges(ItemStack stack) {
         return stack.getItem().getMaxDamage() - stack.getItemDamage();
     }
+
+    @Override
+    public boolean isRepairable() {
+        return false;
+    }
 }