#99 daylight detector inverted

#99 
![daylight_detector_top](https://cloud.githubusercontent.com/assets/401965/3785562/415615ce-19c6-11e4-964d-19a480f8b61c.png)
![daylight_detector_inverted_top](https://cloud.githubusercontent.com/assets/401965/3785555/1ad71ec0-19c6-11e4-9bff-9e762ee8243b.png)

![2014-08-11_16 57 16](https://cloud.githubusercontent.com/assets/401965/3877692/0911781c-2168-11e4-9d48-b9f5d3a1111c.png)