Mikrotik device tracker (#2522)

* Create device_tracker.mikrotik.markdown

* Add mikrotik logo

source/_components/device_tracker.mikrotik.markdown

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+---
+layout: page
+title: "Mikrotik"
+description: "Instructions how to integrate Mikrotik/Routerboard based routers into Home Assistant."
+date: 2017-04-28 16:03
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: mikrotik.png
+ha_category: Presence Detection
+ha_release: "0.43"
+---
+
+
+The `Mikrotik` platform offers presence detection by looking at connected devices to a [Mikrotik Routerboard](http://routerboard.com) based router.
+
+To use an Mikrotik router in your installation, add the following to your `configuration.yaml` file:
+
+```yaml
+# Example configuration.yaml entry
+device_tracker:
+  - platform: mikrotik
+    host: 192.168.81.1
+    username: admin
+    password: hellomoto
+    port: 1603
+```
+
+Configuration variables:
+
+- **host** (*Required*): The IP address of your router.
+- **username** (*Required*: The username of an user with administrative privileges.
+- **password** (*Required*): The password for your given admin account.
+- **port** (*Optional*): Mikrotik api port (See IP -> Services -> api ), default 8728
+
+See the [device tracker component page](/components/device_tracker/) for instructions how to configure the people to be tracked.