Updated Nest Documentation for Oauth2 (#1532)

* Updated Nest Documentation for Oauth2

* Update nest.markdown

source/_components/nest.markdown

@@ -14,18 +14,38 @@ featured: true
 
 The Nest component is the main component to integrate all [Nest](https://nest.com/) related platforms. To connect Nest, you will have to [sign up for a developer account](https://developers.nest.com/products) and get a client_id and client_secret.
 
+### {% linkable_title Setting up developer account %}
+
+1. Log into [https://developers.nest.com/](https://developers.nest.com/)
+2. Fill in account details 
+  - The compnay details can be any made up information.
+3. Submit changes
+4. Click "[Products](https://developers.nest.com/products)" at top of page
+5. Click "[Create New Product](https://developers.nest.com/products/new)" to start a new api client
+6. Fill in details
+  - Product name must be unique. I recommend [email] - Home Assistant.
+  - The description, users, urls can all be anything you want
+7. For permissions check every box and if it's an option select the read/write option.
+  - The description requires a specific format to be accepted.
+    - Use "[Home Assistant] [Edit] [For Home Automation]" as the description as it is not super important.
+8. Click "Create Product"
+9. Once the new product page opens the "Product ID" and "Product Secret" are located on the right side.
+10. After these configs are updated and Home Assistant is started a configurator will pop up asking you to log in and copy a authorization code into Home Assistant.
+
+### {% linkable_title Configuration %}
+
 ```yaml
 # Example configuration.yaml entry
 nest:
-  client_id: ABCD
-  client_secret: ABCD
+  client_id: CLIENT_ID
+  client_secret: CLIENT_SECRET
 ```
 
 ```yaml
 # Example configuration.yaml entry to show only devices at your vacation and primary homes
 nest:
-  username: USERNAME
-  password: PASSWORD
+  client_id: CLIENT_ID
+  client_secret: CLIENT_SECRET
   structure:
     - Vacation
     - Primary