Added getContents() to IInventory and implemented it.

Implemented Inventory and PlayerInventory and updated StorageMinecart and Slot.
Added getMaxStackSize to CraftItemStack.

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

@@ -0,0 +1,71 @@
+package net.minecraft.server;
+
+
+public class InventoryLargeChest
+        implements IInventory {
+
+    private String a;
+    private IInventory b;
+    private IInventory c;
+    
+    // CraftBukkit start
+    public ItemStack[] getContents() {
+        ItemStack[] result = new ItemStack[a()];
+        for (int i = 0; i < result.length; i++) {
+            result[i] = a(i);
+        }
+        return result;
+    }
+    // CraftBukkit end
+
+    public InventoryLargeChest(String s, IInventory iinventory, IInventory iinventory1) {
+        a = s;
+        b = iinventory;
+        c = iinventory1;
+    }
+
+    public int a() {
+        return b.a() + c.a();
+    }
+
+    public String b() {
+        return a;
+    }
+
+    public ItemStack a(int i) {
+        if (i >= b.a()) {
+            return c.a(i - b.a());
+        } else {
+            return b.a(i);
+        }
+    }
+
+    public ItemStack a(int i, int j) {
+        if (i >= b.a()) {
+            return c.a(i - b.a(), j);
+        } else {
+            return b.a(i, j);
+        }
+    }
+
+    public void a(int i, ItemStack itemstack) {
+        if (i >= b.a()) {
+            c.a(i - b.a(), itemstack);
+        } else {
+            b.a(i, itemstack);
+        }
+    }
+
+    public int c() {
+        return b.c();
+    }
+
+    public void d() {
+        b.d();
+        c.d();
+    }
+
+    public boolean a_(EntityPlayer entityplayer) {
+        return b.a_(entityplayer) && c.a_(entityplayer);
+    }
+}