Use a precompiled header for many std includes.

src/Memory/BorrowedPtr.hpp

@@ -1,7 +1,6 @@
 #ifndef ARBUTILS_BORROWEDPTR_HPP
 #define ARBUTILS_BORROWEDPTR_HPP
 
-#include <memory>
 #include "../Assert.hpp"
 
 namespace ArbUt {

src/Memory/UniquePtrList.hpp

@@ -1,10 +1,6 @@
 #ifndef ARBUTILS_UNIQUEPTRLIST_HPP
 #define ARBUTILS_UNIQUEPTRLIST_HPP
 
-#include <algorithm>
-#include <sstream>
-#include <stdexcept>
-#include <vector>
 #include "BorrowedPtr.hpp"
 
 namespace ArbUt {