Update generic camera platform

source/_components/camera.generic.markdown

@@ -13,9 +13,9 @@ ha_release: pre 0.7
 ---
 
 
-The `generic` camera platform allows you to integrate any IP camera into Home Assistant. It supports fetching images from a url with optional HTTP authentication.
+The `generic` camera platform allows you to integrate any IP camera or other url into Home Assistant. Templates can be used to generate the urls on the fly.
 
-Home Assistant will serve the images via its server, making it possible to view your IP camera's while outside of your network. The endpoint is `/api/camera_proxy/camera.[name]?time=[timestamp]`.
+Home Assistant will serve the images via its server, making it possible to view your IP camera's while outside of your network. The endpoint is `/api/camera_proxy/camera.[name]`.
 
 To enable this camera in your installation, add the following to your `configuration.yaml` file:
 
@@ -28,12 +28,23 @@ camera:
   username: USERNAME
   password: PASSWORD
   authentication: basic
+  limit_refetch_to_url_change: true
 ```
 
 Configuration variables:
 
-- **still_image_url** (*Required*): The URL your camera serves the image on, eg. http://192.168.1.21:2112/
+- **still_image_url** (*Required*): The URL your camera serves the image on, eg. http://192.168.1.21:2112/. Can be a [template].
 - **name** (*Optional*): This parameter allows you to override the name of your camera.
 - **username** (*Optional*): The username for accessing your camera.
 - **password** (*Optional*): The password for accessing your camera.
-- **authentication** (*Optional*): `basic` (default) or `digest` auth for requests.
+- **authentication** (*Optional*): `basic` (default) or `digest` auth for requests.
+- **limit_refetch_to_url_change** (*Optional*): true/false value (default: false). Limits refetching of the remote image to when the url changes. Only relevant if using a template to fetch the remote image.
+
+<p class='img'>
+  <a href='/cookbook/google_maps_card/'>
+    <img src='/images/components/camera/generic-google-maps.png' alt='Screenshot showing Google Maps integration in Home Assistant front end.'>
+    Example showing the Generic camera platform pointing at a dynamic Google Map image.
+  </a>
+</p>
+
+[template]: /topics/templating/

source/_cookbook/custom_panel_using_react.markdown

@@ -7,7 +7,7 @@ sidebar: true
 comments: false
 sharing: true
 footer: true
-ha_category: Custom Panel Examples
+ha_category: User Interface
 ---
 
 This is a [React](https://facebook.github.io/react/) implementation of [TodoMVC](http://todomvc.com/) but instead of checking off to do items, you are turning lights and switches on/off.

source/_cookbook/google_maps_card.markdown

@@ -0,0 +1,31 @@
+---
+layout: page
+title: "Show Google Maps as a card"
+description: "Example how to show a Google Map as a Google card."
+date: 2016-08-20 19:05
+sidebar: true
+comments: false
+sharing: true
+footer: true
+ha_category: User Interface
+---
+
+Using the [generic camera platform] you can present any image on the internet as a camera. Starting release 0.27 these urls can also be based on a template. This example uses this functionality to point a generic camera at the Google Maps static image API and pass in the location of a device.
+
+It also leverages the `limit_refetch_to_url_change` option to ensure that we do not make a lot of requests to the Google Maps API.
+
+```yaml
+# Example configuration.yaml entry.
+# Shows device_tracker.demo_paulus on a map.
+camera:
+  name: Paulus
+  platform: generic
+  still_image_url: {% raw %}https://maps.googleapis.com/maps/api/staticmap?center={{ states.device_tracker.demo_paulus.attributes.latitude }},{{ states.device_tracker.demo_paulus.attributes.longitude }}&zoom=13&size=500x500&maptype=roadmap&markers=color:blue%7Clabel:P%7C{{ states.device_tracker.demo_paulus.attributes.latitude }},{{ states.device_tracker.demo_paulus.attributes.longitude }}{% endraw %}
+  limit_refetch_to_url_change: true
+```
+
+<p class='img'>
+  <img src='/images/components/camera/generic-google-maps.png' alt='Screenshot showing Google Maps integration in Home Assistant front end.'>
+</p>
+
+[generic camera platform]: /components/camera.generic/