Reogranise documentation filenames

docs/03_mink_integration.md

@@ -0,0 +1,42 @@
+## Mink integration
+
+*SymfonyExtension* provides an integration with [Mink](https://github.com/minkphp/Mink) and defines a dedicated,
+isolated driver to use for Symfony application testing.
+
+### Installation
+
+1. Require the packages needed for the driver using *Composer*:
+
+```bash
+composer require --dev behat/mink-extension behat/mink-browserkit-driver
+```
+
+2. Enable the bundled driver:
+
+```yaml
+# behat.yml.dist / behat.yml
+
+default:
+    extensions:
+        # ...
+        Behat\MinkExtension:
+            sessions:
+                symfony:
+                    symfony: ~
+```
+
+### Usage
+
+This integration provides two services to use inside Symfony container:
+
+ * **`behat.mink.default_session`** (autowired by `\Behat\Mink\Session`) - the default Mink session for the current scenario
+ 
+ * **`behat.mink.parameters`** (autoconfigured by `$minkParameters`) - an array (`\ArrayAccess` object) containing the 
+ configuration parameters of `MinkExtension`
+
+### Caveats
+
+This driver behaviour differs from the one provided with [`Behat/Symfony2Extension`](https://github.com/Behat/Symfony2Extension),
+as it uses an isolated application kernel instance, so that services state changes within your contexts does not affect 
+the driver results. With that limitation, changing the driver to a different one is seamless. For more information, look
+at [this issue](https://github.com/Behat/Symfony2Extension/issues/112).