add copyright notice

Author: HenryAtUber

README.md

@@ -1 +1,13 @@
 # cplusplus-templates-the-complete-guide-2nd-edition
+
+These are the examples from the following book:
+
+```
+ Nicolai M. Josuttis
+ C++ Templates - The Complete Guide, 2nd Edition
+ Addison-Wesley, 2017
+ ISBN-13:  978-0-321-71412-1
+ ISBN-10:          0-321-71412-1
+```
+Copyright © 2017 by Addison-Wesley, David Vandevoorde, Nicolai M. Josuttis, and Douglas Gregor.
+