updated README.rst for 2nd edition

Author: ramalho

README.rst

@@ -1,16 +1,12 @@
-Fluent Python: example code
-===========================
+Fluent Python 2e example code
+=============================
 
-Example code for the book `Fluent Python`_ by Luciano Ramalho (O'Reilly, 2014).
+Example code for the book **Fluent Python, 2nd edition** by Luciano Ramalho (O'Reilly, 2020).
 
    **BEWARE**: This is a work in progress, like the book itself.
 
 * Code here may change and disappear without warning. 
 
-* If a piece of code is not yet in the ebook, it's likely to be broken.
-
-* A major reorganization may happen when the last chapter is done. 
+* A major reorganizations may happen at any time. 
 
 * No promises. No guarantees. Use at own risk.
-
-.. _Fluent Python: http://shop.oreilly.com/product/0636920032519.do