Updated education levels to new API format.

* added translation to education levels
* updated education chart and table text

![edu](https://cloud.githubusercontent.com/assets/5265058/4849848/a571622c-6064-11e4-8dae-d3df1e269735.png)

@rocha @clintonb @lamagnifica @shnayder @marcotuts 
Added `LazyEncoderMixin` which has `get_page_data `.