Documentation for the haveibeenpwned sensor platform (#1023)

* Documentation for the haveibeenpwned sensor platform

* add ha_release and fix a few typo's / linebreaks

* Update version of haveibeenpwned to be in HA 0.31

source/_components/sensor.haveibeenpwned.markdown

@@ -0,0 +1,46 @@
+---
+layout: page
+title: "HaveIBeenPwned Sensor"
+description: "Instructions how to integrate HaveIBeenPwned sensor into Home Assistant."
+date: 2016-09-29 18:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: haveibeenpwned.png
+ha_category: Sensor
+ha_release: 0.31
+---
+
+The `haveibeenpwned` sensor platform creates sensors that check for breached email accounts on [haveibeenpwned](https://haveibeenpwned.com).
+To enable this sensor, add the following lines to your `configuration.yaml`, it will list every specified email address as a sensor showing
+the number of breaches on that email account:
+
+```yaml
+# Example configuration.yaml entry using cloud based emoncms
+sensor:
+  platform: haveibeenpwned
+  email: 
+    - your_email1@domain.com
+    - your_email2@domain.com
+```
+
+## {% linkable_title Breach meta data %}
+
+If one of your email accounts is breached the sensor will display breach meta data. It will list the title of the site where your email
+account has been breached as well as the added date of the breach data. This data is displayed in descending order so that the state attribute
+`breach 1` will always contain the last known breach for the specific email account, if there are any breaches detected.
+
+<p class='img'>
+  <img src='/images/components/haveibeenpwned/sensor.png' />
+</p>
+
+## {% linkable_title Configuration variables %}
+
+- **email** (*Required*): List of email addresses.
+
+<p class='note warning'>
+  The sensor will scan all email addresses specified with a 5 second delay between all breach data requests on Home Assistant startup.
+  After this initial startup scanning, the sensor will only scan one email account per 15 minutes to prevent abuse, and not hammer "the
+  Have I been Pwned" service, as this breach data almost never changes.
+</p>