Fixed markdown and added logo (#551)

source/_components/sensor.rfxtrx.markdown

@@ -7,6 +7,7 @@ sidebar: true
 comments: false
 sharing: true
 footer: true
+logo: rfxtrx.png
 ha_category: Sensor
 ---
 
@@ -16,7 +17,7 @@ First you have to set up your [rfxtrx hub.](/components/rfxtrx/)
 The easiest way to find your sensors is to add this to your `configuration.yaml`:
 
 ```yaml
-sensor: 
+sensor:
  platform: rfxtrx
  automatic_add: True
 ```
@@ -27,26 +28,26 @@ Then when the sensor emits a signal it will be automatically added:
 <img src='/images/components/rfxtrx/sensor.png' />
 </p>
 
-Here the name is 0a52080000301004d240259 and you can verify that it works from the frontend. 
+Here the name is 0a52080000301004d240259 and you can verify that it works from the frontend.
 Then you should update your configuration to:
 
 ```yaml
 sensor:
  platform: rfxtrx
  devices:
-    0a52080000301004d240259: 
+    0a52080000301004d240259:
         name: device_name
 ```
 
 If you want to display several data types from one sensor:
 
 ```yaml
-sensor: 
+sensor:
  platform: rfxtrx
  devices:
-    0a520802060100ff0e0269: 
+    0a520802060100ff0e0269:
         name: Bath
-        data_type: 
+        data_type:
          - Humidity
          - Temperature
 ```
@@ -57,7 +58,7 @@ Example configuration:
 
 ```yaml
 # Example configuration.yaml entry
-sensor: 
+sensor:
  platform: rfxtrx
  automatic_add: True
  devices:
@@ -65,7 +66,7 @@ sensor:
      name: Lving
    0a520802060100ff0e0269:
         name: Bath
-        data_type: 
+        data_type:
          - Humidity
          - Temperature
 ```
@@ -75,4 +76,3 @@ Configuration variables:
 - **devices**  (*Optional*): A list of devices with their name to use in the frontend.
 - **automatic_add** (*Optional*): To enable the automatic addition of new lights.
 - **data_type**  (*Optional*): Which data type the sensor should show
-