Added cItemGrid to represent an XY grid of items; converted chests to use cItemGrid.

http://forum.mc-server.org/showthread.php?tid=831

git-svn-id: http://mc-server.googlecode.com/svn/trunk@1380 0a769ca7-a7f5-676a-18bf-c427514a06d6

source/Item.cpp

@@ -8,6 +8,21 @@
 
 
 
+bool cItem::IsStackableWith(const cItem & a_OtherStack)
+{
+	if (a_OtherStack.m_ItemType != m_ItemType)
+	{
+		return false;
+	}
+	
+	// TODO: match enchantments etc.
+	return true;
+}
+
+
+
+
+
 void cItem::GetJson( Json::Value & a_OutValue ) const
 {
 	a_OutValue["ID"] = m_ItemType;