Restructure PaperSpigot as a new set of modules

Allows us much greater control over the Spigot portion of the code
and makes us more "proper"
Credit to @Dmck2b for originally passing the idea along a while back

CraftBukkit-Patches/0078-Fix-anvil-collisions.patch

@@ -0,0 +1,27 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Thinkofdeath <thethinkofdeath@gmail.com>
+Date: Thu, 9 Jan 2014 14:19:12 +0000
+Subject: [PATCH] Fix anvil collisions
+
+
+diff --git a/src/main/java/net/minecraft/server/BlockAnvil.java b/src/main/java/net/minecraft/server/BlockAnvil.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/server/BlockAnvil.java
++++ b/src/main/java/net/minecraft/server/BlockAnvil.java
+@@ -0,0 +0,0 @@ public class BlockAnvil extends BlockFalling {
+         this.a(CreativeModeTab.c);
+     }
+ 
++    // Spigot start
++    @Override
++    public AxisAlignedBB a( World world, int i, int j, int k )
++    {
++        updateShape( world, i, j, k );
++        return super.a( world, i, j, k );
++    }
++    // Spigot end
++
+     public boolean d() {
+         return false;
+     }
+--