health insurance by age, race, nativity, school enrollment and income

Imported and displaying health insurance data #149 on the [staging site](http://chicago-atlas-staging.herokuapp.com/) in 5 groupings:
* by age (Under 17, 18-64, 65+)
* by race (White, Latino, Black and Asian)
* by nativity and citizenship
* by school enrollment
* by income (4 poverty levels)

This is displayed on the [map](http://chicago-atlas-staging.herokuapp.com/map/all_uninsured#/?year=2008):
![screen shot 2014-04-22 at 11 11 52 pm](https://cloud.githubusercontent.com/assets/919583/2773531/6bed5b30-ca9d-11e3-9dab-a4ba91739815.png)

And on the [community area detail pages](http://chicago-atlas-staging.herokuapp.com/place/south_lawndale#all_uninsured):

![screen shot 2014-04-22 at 11 08 13 pm](https://cloud.githubusercontent.com/assets/919583/2773511/f84e4252-ca9c-11e3-8be0-99944973931a.png)
![screen shot 2014-04-22 at 11 08 25 pm](https://cloud.githubusercontent.com/assets/919583/2773512/f9f5d91c-ca9c-11e3-8bd9-da8aa82ac19e.png)

Also, displaying the selected demographic indicators on the map that were already loaded:

* [Below Poverty Level](http://chicago-atlas-staging.herokuapp.com/map/demographics_below_poverty_level#/?year=2007)
* [Crowded Housing](http://chicago-atlas-staging.herokuapp.com/map/demographics_crowded_housing#/?year=2007)
* [Dependency](http://chicago-atlas-staging.herokuapp.com/map/demographics_dependency#/?year=2007)
* [No High School Diploma](http://chicago-atlas-staging.herokuapp.com/map/demographics_no_high_school_diploma#/?year=2007)
* [Per capita income](http://chicago-atlas-staging.herokuapp.com/map/demographics_per_capita_income#/?year=2007)
* [Unemployment](http://chicago-atlas-staging.herokuapp.com/map/demographics_unemployment#/?year=2007)