Fix Wood(plank) and add Sandstone MaterialData; addresses BUKKIT-1384

By: Wesley Wolfe <weswolf@aol.com>

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

@@ -0,0 +1,62 @@
+package org.bukkit.material;
+
+import org.bukkit.Material;
+import org.bukkit.SandstoneType;
+
+/**
+ * Represents the different types of sandstone.
+ */
+public class Sandstone extends MaterialData {
+    public Sandstone() {
+        super(Material.SANDSTONE);
+    }
+
+    public Sandstone(SandstoneType type) {
+        this();
+        setType(type);
+    }
+
+    public Sandstone(final int type) {
+        super(type);
+    }
+
+    public Sandstone(final Material type) {
+        super(type);
+    }
+
+    public Sandstone(final int type, final byte data) {
+        super(type, data);
+    }
+
+    public Sandstone(final Material type, final byte data) {
+        super(type, data);
+    }
+
+    /**
+     * Gets the current type of this sandstone
+     *
+     * @return SandstoneType of this sandstone
+     */
+    public SandstoneType getType() {
+        return SandstoneType.getByData(getData());
+    }
+
+    /**
+     * Sets the type of this sandstone
+     *
+     * @param type New type of this sandstone
+     */
+    public void setType(SandstoneType type) {
+        setData(type.getData());
+    }
+
+    @Override
+    public String toString() {
+        return getType() + " " + super.toString();
+    }
+
+    @Override
+    public Sandstone clone() {
+        return (Sandstone) super.clone();
+    }
+}