Update honeywell thermostat docs for US devices

source/_components/thermostat.honeywell.markdown

@@ -2,7 +2,7 @@
 layout: page
 title: "Honeywell Thermostat"
 description: "Instructions how to integrate Honeywell thermostats within Home Assistant."
-date: 2015-11-09 17:15
+date: 2016-02-07 22:01
 sidebar: true
 comments: false
 sharing: true
@@ -23,8 +23,23 @@ thermostat:
   password:  YOUR_PASSWORD
 ```
 
+If you are using a Honeywell thermostat in the US, you also need to provide the thermostat identifier:
+
+```yaml
+  id: IDENT
+```
+
 Configuration variables:
 
 - **username** (*Required*: The username of an user with access.
 - **password** (*Required*): The password for your given admin account.
 - **away_temperature** (*optional*): Heating setpoint when away mode is on. If omitted it defaults to 16.0 deg C.
+- **id** (*optional*): Thermostat identifier
+
+To find your thermostat identifier, log into your account, choose a thermostat (if applicable) and then look at the URL. It should look something like this:
+
+```
+https://mytotalconnectcomfort.com/portal/Device/Control/1234567
+```
+
+In this case, the identifier is `1234567`.