Update CraftBukkit to Minecraft 1.3.1

src/main/java/net/minecraft/server/IRecipe.java

@@ -0,0 +1,14 @@
+package net.minecraft.server;
+
+public interface IRecipe {
+
+    boolean a(InventoryCrafting inventorycrafting);
+
+    ItemStack b(InventoryCrafting inventorycrafting);
+
+    int a();
+
+    ItemStack b();
+
+    org.bukkit.inventory.Recipe toBukkitRecipe(); // CraftBukkit
+}