Added bizkaibus.makdown (#9280)

* Added bizkaibus.makdown

* Changed description

* Changed the category, made a link clickable and deleted the unnecessary configuration.

* Added requisites for a correct use of the sensor.

* Added the logo

* ✏️

After this we can merge

source/_components/bizkaibus.markdown

@@ -0,0 +1,50 @@
+---
+layout: page
+title: "Bizkaibus next bus tracking sensor"
+description: "Instructions on how to integrate timetable data for traveling on Bizkaibus within Home Assistant."
+date: 2019-04-22 14:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: bizkaibus.png
+ha_category: 
+  - Transport
+  - Sensor
+ha_iot_class: Cloud Polling
+ha_release: 0.93
+---
+
+The `bizkaibus` sensor will give you the time until the next bus in the selected stop.
+
+The next website can help to determine the id of your bus stop. You can check if this is correct by going to [next link](http://apli.bizkaia.net/APPS/DANOK/TQ/DATOS_PARADAS/DATOS_Paradas.xml) and look the PR_CODE for the STOP_ID.
+
+For a correct use of the sensor the selected route must stop in the selected stop.
+
+Then add the data to your `configuration.yaml` file as shown in the example:
+
+```yaml
+# Example configuration.yaml entry
+sensor:
+  - platform: bizkaibus
+    stopid: STOP_ID
+    route: ROUTE_ID
+```
+
+{% configuration %}
+stopid:
+  description: The ID of the bus stop to get the information for.
+  required: true
+  type: string
+route:
+  description: The ID of the bus route to get information for. This is the same as the bus number, e.g., `A3641`.
+  required: true
+  type: string
+name:
+  description: A friendly name for this sensor.
+  required: false
+  default: Next Bus
+  type: string
+{% endconfiguration %}
+
+The public RTPI information is coming from [Bizkaibus API](http://apli.bizkaia.net/APPS/DANOK/TQWS/TQ.ASMX).