Goalfeed (#4211)

* add goalfeed docs

* update date

* Update email address

* changes as per notes

* Minor changes

source/_components/goalfeed.markdown

@@ -0,0 +1,54 @@
+---
+layout: page
+title: "Goalfeed"
+description: "Instructions on how to setup Goalfeed events within Home Assistant."
+date: 2017-12-13 17:30
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: goalfeed.png
+ha_category: Other
+ha_version: 0.63
+---
+
+The `goalfeed` component lets you use your Goalfeed account to trigger events in Home Assistant whenever a NHL or MLB team scores. 
+
+To use this component, enter your email address and password from your goalfeed.ca account in your `configuration.yaml` file:
+
+```yaml
+# Example configuration.yaml entry
+goalfeed:
+  username: your_email@gmail.com
+  password: goalfeed_password
+```
+
+{% configuration %}
+username:
+  required: true
+  description: The email address on your goalfeed.ca account.
+  type: string
+password:
+  required: true
+  description: The password on your goalfeed.ca account.
+  type: string
+{% endconfiguration %}
+
+Now you can use the goal event type in your automations:
+
+```yaml
+- alias: 'Jets Goal'
+  trigger:
+    platform: event
+    event_type: goal
+    event_data:
+      team_name: "Winnipeg Jets"
+```
+
+Goal events have the following event data:
+
+- **team**: Three letter code representing the team. This is unique within the leagues, but not unique across the leagues (i.e. 'WPG' or 'TOR').
+- **team_name**: The team that scored (i.e. 'Winnipeg Jets' or 'Toronto Blue Jays').
+- **team_hash**: A unique hash for the team (you can find these values on https://goalfeed.ca/get-teams).
+- **league_id**: A unique number for the league.
+- **league_name**: A the short name of the league (i.e. 'NHL' or 'MLB').