Add TED5000 documentation (#998)

* Add TED5000 documentation

Signed-off-by: Gwendal Grignou <gwendal@gmail.com>

* Update sensor.ted5000.markdown

* Update sensor.ted5000.markdown

Use MTU instead of mtu throughout.

* Update sensor.ted5000.markdown

Reflect simpler configuration setup.

Signed-off-by: Gwendal Grignou <gwendal@gmail.com>

source/_components/sensor.ted5000.markdown

@@ -0,0 +1,41 @@
+---
+layout: page
+title: "TED5000 electricity monitoring"
+description: "How to add a TED5000 to Home Assistant."
+date: 2016-09-27 11:19
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: ted.png
+ha_category: Sensor
+ha_release: 0.30
+
+The `ted 5000` monitors electricity consumption/production by connecting to the
+[TED](http://www.theenergydetective.com/home) gateway, itself connected to one
+or several Measuring Transmitting Units (MTU).
+The platform creates up to two sensors per MTU, one for Wattage the other for
+Voltage.  If you want to enable the ted5000 sensor, add the following lines to
+your `configuration.yaml`:
+
+```yaml
+# Example configuration.yaml entry
+sensor:
+  platform: ted5000
+  name: main
+  host: 192.168.1.100
+  port: 80
+```
+
+Configuration variables:
+
+- **host** (*Required*): The IP address of your ted gateway.
+- **port** (*Optional*): The port of your ted gateway. Defaults to 80.
+- **name** (*Optional*): Name of the ted gateway. Defaults to ted.
+
+For each plugged MTU, using an index starting at 1, the platorm creates 2 sensors:
+```yaml
+sensor.<name>_mtu<MTU id>_power
+sensor.<name>_mtu<MTU id>_voltage
+```
+