Explain changes from Kconfiglib 1 to Kconfiglib 2

I wonder if there's a nicer way to get an italic link with RST...

1 files changed, 7 insertions, 0 deletions

diff --git a/README.rst b/README.rst
index f08eafd..2d7a985 100644
--- a/README.rst
+++ b/README.rst
@@ -4,6 +4,13 @@
 Overview
 --------
 
+*This is version 2 of Kconfiglib, which is not backwards-compatible with
+Kconfiglib 1. For a summary of changes between Kconfiglib 1 and Kconfiglib 2,
+see* |changes|_.
+
+.. _changes: kconfiglib-2-changes.txt
+.. |changes| replace:: *kconfiglib-2-changes.txt*
+
 Kconfiglib is a Python 2/3 library for scripting and extracting information
 from `Kconfig
 <https://www.kernel.org/doc/Documentation/kbuild/kconfig-language.txt>`_