shared_ptr -> std::shared_ptr

This is one of the first commits in a plan to remove all `using namespace std;` lines in the entire codebase as it is considered anti-pattern today.

Minecraft.World/ContainerClickPacket.cpp

@@ -21,7 +21,7 @@ ContainerClickPacket::ContainerClickPacket()
 	quickKey = false;
 }
 
-ContainerClickPacket::ContainerClickPacket(int containerId, int slotNum, int buttonNum, bool quickKey, shared_ptr<ItemInstance> item, short uid)
+ContainerClickPacket::ContainerClickPacket(int containerId, int slotNum, int buttonNum, bool quickKey, std::shared_ptr<ItemInstance> item, short uid)
 {
 	this->containerId = containerId;
 	this->slotNum = slotNum;
@@ -59,7 +59,7 @@ void ContainerClickPacket::write(DataOutputStream *dos) // throws IOException
 	writeItem(item, dos);
 }
 
-int ContainerClickPacket::getEstimatedSize() 
+int ContainerClickPacket::getEstimatedSize()
 {
 	return 4 + 4 + 2 + 1;
 }