Added api for weather information.

Signed-off-by: Ah-Lun Tang <tang@ahlun.be>
Added example config for weather and removed duplicate code from weathercontroller.

Signed-off-by: Ah-Lun Tang <tang@ahlun.be>
added location to weather output in api.

Signed-off-by: Ah-Lun Tang <tang@ahlun.be>