book: translate ch03

see #12

code/3/3.4.historical.cpp

@@ -0,0 +1,16 @@
+//
+// 3.4.historical.cpp
+// modern c++ tutorial
+//
+// created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
+//
+
+#include <iostream>
+
+int main() {
+    // int &a = std::move(1); // illegal, non-const lvalue reference cannot ref rvalue
+    const int &b = std::move(1); // legal, const lvalue reference can
+
+    std::cout << b << std::endl;
+}