Merge branch 'refs/heads/develop' into feature/unit-tests

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	user_guide/helpers/number_helper.html

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diff --git a/user_guide_src/source/installation/upgrade_202.rst b/user_guide_src/source/installation/upgrade_202.rst
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+#############################
+Upgrading from 2.0.1 to 2.0.2
+#############################
+
+Before performing an update you should take your site offline by
+replacing the index.php file with a static one.
+
+Step 1: Update your CodeIgniter files
+=====================================
+
+Replace all files and directories in your "system" folder and replace
+your index.php file. If any modifications were made to your index.php
+they will need to be made fresh in this new one.
+
+.. note:: If you have any custom developed files in these folders please
+	make copies of them first.
+
+Step 2: Remove loading calls for the Security Library
+=====================================================
+
+Security has been moved to the core and is now always loaded
+automatically. Make sure you remove any loading calls as they will
+result in PHP errors.
+
+Step 3: Move MY_Security
+=========================
+
+If you are overriding or extending the Security library, you will need
+to move it to application/core.
+
+csrf_token_name and csrf_hash have changed to protected class
+properties. Please use security->get_csrf_hash() and
+security->get_csrf_token_name() to access those values.