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/0056-Clear-Flower-Pot-on-Drop.patch

@@ -0,0 +1,19 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: md_5 <md_5@live.com.au>
+Date: Tue, 3 Dec 2013 11:07:48 +1100
+Subject: [PATCH] Clear Flower Pot on Drop
+
+
+diff --git a/src/main/java/net/minecraft/server/BlockFlowerPot.java b/src/main/java/net/minecraft/server/BlockFlowerPot.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/server/BlockFlowerPot.java
++++ b/src/main/java/net/minecraft/server/BlockFlowerPot.java
+@@ -0,0 +0,0 @@ public class BlockFlowerPot extends BlockContainer {
+ 
+         if (tileentityflowerpot != null && tileentityflowerpot.a() != null) {
+             this.a(world, i, j, k, new ItemStack(tileentityflowerpot.a(), 1, tileentityflowerpot.b()));
++            tileentityflowerpot.a( null, 0 ); // Spigot
+         }
+ 
+         super.remove(world, i, j, k, block, l);
+--