Feat/clouds/main

- UI now has visual indication of current cloudiness
 - Scale of 0-5 clouds
 - Clouds are filled in to indicate cloudiness

@rburr @blakecarrier @lukesteffen 
@tomstrassner There is nothing wrong with removing the subviews this way, but here is another nifty way to do it:
```
[self.subviews makeObjectsPerformSelector: @selector(removeFromSuperview)];
```