Add dlib doc (#2576)

source/_components/image_processing.dlib_face_detect.markdown

@@ -0,0 +1,34 @@
+---
+layout: page
+title: "Dlib Face Detect"
+description: "Instructions how to integrate Dlib Face Detect into Home Assistant."
+date: 2017-05-05 00:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: dlib.png
+ha_category: Image Processing
+featured: false
+ha_release: 0.44
+---
+
+The `dlib_face_detect` image processing platform allows you to use the [Dlib](http://www.dlib.net/) through Home Assistant. This platform enables you do detect face on camera and fire a event with attributes.
+
+For using the result inside an automation rule, take a look at the [component](/components/image_processing/) page.
+
+### {% linkable_title Configuration Home Assistant %}
+
+```yaml
+# Example configuration.yaml entry
+image_processing:
+  - platform: dlib_face_detect
+    source:
+      - entity_id: camera.door
+```
+
+Configuration variables:
+
+- **source** array (*Required*): List of image sources.
+  - **entity_id** (*Required*): A camera entity id to get picture from.
+  - **name** (*Optional*): This parameter allows you to override the name of your `image_processing` entity.