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.Client/TrapScreen.h

@@ -6,7 +6,7 @@ class Inventory;
 class TrapScreen : public AbstractContainerScreen
 {
 public:
-	TrapScreen(shared_ptr<Inventory> inventory, shared_ptr<DispenserTileEntity> trap);
+	TrapScreen(std::shared_ptr<Inventory> inventory, std::shared_ptr<DispenserTileEntity> trap);
 protected:
 	virtual void renderLabels();
     virtual void renderBg(float a);