Added setters to applicable MaterialData classes.

By: sunkid <sunkid@iminurnetz.com>

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

@@ -5,8 +5,6 @@ import org.bukkit.block.BlockFace;
 
 /**
  * Represents a bed.
- *
- * @author sunkid
  */
 public class Bed extends MaterialData implements Directional {
 
@@ -51,6 +49,14 @@ public class Bed extends MaterialData implements Directional {
         return (getData() & 0x8) == 0x8;
     }
 
+    /**
+     * Configure this to be either the head or the foot of the bed
+     * @param isHeadOfBed
+     */
+    public void setHeadOfBed(boolean isHeadOfBed) {
+        setData((byte) (isHeadOfBed ? (getData() | 0x8) : (getData() & ~0x8)));
+    }
+
     /**
      * Set which direction the head of the bed is facing. Note that this will
      * only affect one of the two blocks the bed is made of.