Added all block hardness

src/pocketmine/block/Cobblestone.php

@@ -22,6 +22,7 @@
 namespace pocketmine\block;
 
 use pocketmine\item\Item;
+use pocketmine\item\Tool;
 
 class Cobblestone extends Solid{
 
@@ -31,29 +32,16 @@ class Cobblestone extends Solid{
 
 	}
 
+	public function getToolType(){
+		return Tool::TYPE_PICKAXE;
+	}
+
 	public function getName(){
 		return "Cobblestone";
 	}
 
 	public function getHardness(){
-		return 30;
-	}
-
-	public function getBreakTime(Item $item){
-		switch($item->isPickaxe()){
-			case 5:
-				return 0.4;
-			case 4:
-				return 0.5;
-			case 3:
-				return 0.75;
-			case 2:
-				return 0.25;
-			case 1:
-				return 1.5;
-			default:
-				return 10;
-		}
+		return 2;
 	}
 
 	public function getDrops(Item $item){