Made hay blocks rotate like logs.

They're textured like them, too, so it fits.
Also, they no longer violate the "flip twice equals rotate twice" conditions.

src/test/java/com/sk89q/worldedit/blocks/BlockDataTest.java

@@ -34,9 +34,6 @@ public class BlockDataTest {
     @Test
     public void testRotateFlip() {
         for (int type = 0; type < 256; ++type) {
-            if (type == BlockID.HAY_BLOCK) {
-                continue; // not monotonous
-            }
             for (int data = 0; data < 16; ++data) {
                 final String message = type + "/" + data;