Merge pull request #167 from datamade/master

health insurance by age, race, nativity, school enrollment and income
Merge pull request #169 from datamade/master

CHITREC data updates
Merge pull request #173 from datamade/master

import and display provider data
Merge pull request #177 from datamade/master

zip code fixes, updated map colors
moved zctas to import folder