Explain that master is not for 3.x

AceLiu · Jan 7, 2016 · b01d84b · b01d84b
1 parent 8866113
commit b01d84b
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diff --git a/README.md b/README.md
@@ -7,6 +7,9 @@ CakePHP Documentation
 This is the official documentation for the CakePHP project. It is available
 online in HTML, PDF and EPUB formats at http://book.cakephp.org.
 
+This `master` branch is the documentation for **CakePHP 2.x**.
+For **CakePHP 3.x** please see `3.0` branch.
+
 Contributing to the documentation is pretty simple. Please read the
 documentation on contributing to the documentation over on [the
 cookbook](http://book.cakephp.org/2.0/en/contributing/documentation.html) for