Display which tool the player is holding

And some simple animation when trying to dig...

src/player.h

@@ -356,6 +356,8 @@ public:
 	{
 		return true;
 	}
+	
+	void wieldItem(u16 item);
 
 	void move(f32 dtime, Map &map, f32 pos_max_d,
 			core::list<CollisionInfo> *collision_info);
@@ -365,6 +367,8 @@ public:
 	
 	PlayerControl control;
 
+	scene::ISceneNode *wield;
+
 private:
 	// This is used for determining the sneaking range
 	v3s16 m_sneak_node;