Add material data classes for cake, jukeboxes, and diodes. Remove some unneeded ones.

By: Celtic Minstrel <celtic.minstrel.ca@>

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

@@ -0,0 +1,43 @@
+package org.bukkit.material;
+
+import org.bukkit.Material;
+
+public class Diode extends MaterialData {
+
+    public Diode(int type) {
+        super(type);
+    }
+
+    public Diode(Material type) {
+        super(type);
+    }
+
+    public Diode(int type, byte data) {
+        super(type, data);
+    }
+
+    public Diode(Material type, byte data) {
+        super(type, data);
+    }
+
+    /**
+     * Sets the delay of the repeater
+     * 
+     * @param delay The new delay (1-4)
+     */
+    public void setDelay(int delay) {
+        if (delay > 4) delay = 4;
+        if (delay < 1) delay = 1;
+        byte newData = (byte) (getData() & 0x3);
+        setData((byte) (newData | (delay - 1)));
+    }
+
+    /**
+     * Gets the delay of the repeater
+     * 
+     * @return The delay (1-4)
+     */
+    public int getDelay() {
+        return (getData() & 0xC) + 1;
+    }
+}