Update README.md

BaseMax · web-flow · commit b9bb65ae779e · 2019-05-16T07:19:29.000+04:30
diff --git a/README.md b/README.md
@@ -42,3 +42,11 @@ Total Installed Size:  12.64 MiB
 ### Windows
 
 We can use from the `SFML/` directory.
+
+### Extra References
+
+https://www.sfml-dev.org/tutorials/2.5/
+
+### License
+
+FirstSFML is licensed under the [GNU General Public License](License).
