added the MaterialData subclass Door

src/main/java/org/bukkit/material/Door.java

@@ -0,0 +1,57 @@
+package org.bukkit.material;
+
+import org.bukkit.Material;
+import org.bukkit.block.BlockFace;
+
+/**
+ * Represents the different types of coals.
+ * @author sunkid
+ */
+public class Door extends MaterialData {
+       public Door(final int type) {
+            super(type);
+        }
+
+        public Door(final Material type) {
+            super(type);
+        }
+
+        public Door(final int type, final byte data) {
+            super(type, data);
+        }
+
+        public Door(final Material type, final byte data) {
+            super(type, data);
+        }
+
+        /**
+         * Check to see if the door is open.
+         * @return true if the door has swung counterclockwise around its hinge.
+         */
+        public boolean isOpen() {
+            return ((getData() & 0x4) == 0x4);
+        }
+        
+        /**
+         * @return whether this is the top half of the door
+         */
+        public boolean isTopHalf() {
+            return ((getData() & 0x8) == 0x8);
+        }
+        
+        /**
+         * @return the location of the hinges
+         */
+        public BlockFace getHingeCorner() {
+            byte d = getData();
+            if ((d & 0x3) == 0x3) {
+                return BlockFace.NORTH_WEST;
+            } else if ((d & 0x1) == 0x1) {
+                return BlockFace.SOUTH_EAST;
+            } else if ((d & 0x2) == 0x2) {
+                return BlockFace.SOUTH_WEST;
+            }
+            
+            return BlockFace.NORTH_EAST;
+        }
+}