Add mkdocs and change menu names to avoid margin collisions (#468)

docs/guides/how-to-use-session-history.md

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+How to enable session history
+============================
+
+Session history list user sessions.
+
+User can delete all sessions except current.
+
+Configure Module and Application
+--------------------------------
+
+```php
+
+// ... 
+
+'modules' => [
+    'user' => [
+        'class' => Da\User\Module::class,
+        'enableSessionHistory' => true,
+    ]
+], 
+
+// ...
+
+'components' => [
+    'session' => Da\User\Service\SessionHistory\SessionHistoryDecorator::class,
+]
+
+// ...
+
+'container' => [
+    'singletons' => [
+        Da\User\Service\SessionHistory\TerminateSessionsServiceInterface::class => Da\User\Service\SessionHistory\TerminateSessionsService::class
+    ]
+]
+
+// ...
+
+'controllerMap' => [
+    'migrate' => [
+        ...
+        'migrationNamespaces' => [
+            'Da\User\Migration\Session',
+        ],
+    ],
+],
+
+```
+
+Additionally for upping migration can use 
+```
+./yii migrate --migrationNamespaces=Da\\User\\Migration\Session
+```
+
+Setting user screenshot:
+![Settings user screenshot](./session-history/settings.png)
+
+Admin screenshot:
+![Admin screenshot](./session-history/admin.png)
+
+© [2amigos](http://www.2amigos.us/) 2013-2019