minor #1188 add changelog to readme (desarrolla2)

This PR was merged into the 1.3 branch.

Discussion
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add changelog to readme

Commits
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b0211b2b Update README.rst

README.rst

@@ -34,7 +34,7 @@ Alternatively, you can download the `silex.zip`_ file and extract it.
 More Information
 ----------------
 
-Read the `documentation`_ for more information.
+Read the `documentation`_ for more information and `changelog`_ for upgrading information.
 
 Tests
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@@ -61,3 +61,4 @@ Silex is licensed under the MIT license.
 .. _PHPUnit:             https://phpunit.de
 .. _silex.zip:           http://silex.sensiolabs.org/download
 .. _documentation:       http://silex.sensiolabs.org/documentation
+.. _changelog:           doc/changelog.rst