Correct 1.5 material data. Fixes BUKKIT-4004, BUKKIT-3785

By: Travis Watkins <amaranth@ubuntu.com>

paper-api/src/main/java/org/bukkit/Material.java

@@ -220,8 +220,8 @@ public enum Material {
     HOPPER(154),
     QUARTZ_BLOCK(155),
     QUARTZ_STAIRS(156, Stairs.class),
-    ACTIVATOR_RAIL(157),
-    DROPPER(158, DirectionalContainer.class),
+    ACTIVATOR_RAIL(157, PoweredRail.class),
+    DROPPER(158, Dispenser.class),
     // ----- Item Separator -----
     IRON_SPADE(256, 1, 250),
     IRON_PICKAXE(257, 1, 250),

paper-api/src/main/java/org/bukkit/material/Dispenser.java

@@ -33,6 +33,63 @@ public class Dispenser extends FurnaceAndDispenser {
         super(type, data);
     }
 
+    public void setFacingDirection(BlockFace face) {
+        byte data;
+
+        switch (face) {
+            case DOWN:
+                data = 0x0;
+                break;
+
+            case UP:
+                data = 0x1;
+                break;
+
+            case NORTH:
+                data = 0x2;
+                break;
+
+            case SOUTH:
+                data = 0x3;
+                break;
+
+            case WEST:
+                data = 0x4;
+                break;
+
+            case EAST:
+            default:
+                data = 0x5;
+        }
+
+        setData(data);
+    }
+
+    public BlockFace getFacing() {
+        int data = getData() & 0x7;
+
+        switch (data) {
+            case 0x0:
+                return BlockFace.DOWN;
+
+            case 0x1:
+                return BlockFace.UP;
+
+            case 0x2:
+                return BlockFace.NORTH;
+
+            case 0x3:
+                return BlockFace.SOUTH;
+
+            case 0x4:
+                return BlockFace.WEST;
+
+            case 0x5:
+            default:
+                return BlockFace.EAST;
+        }
+    }
+
     @Override
     public Dispenser clone() {
         return (Dispenser) super.clone();