Pep8
Merge branch 'beta' into rankings_api
Merge branch 'beta' into rankings_api
Clean up ranking code a bit.
Merge branch 'beta' into rankings_api
Expose gdp and population fields in Cy model.
Add rankings json api w/ route
Make rankings api more specific: it's about countries for now
Merge pull request #155 from cid-harvard/rankings_api

Rankings api