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
viewport scaling for mobile

Detect user agent and generate a meta-tag with an “initial-scale”
specific to the device
fixed #154
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
Revert 661e7e4..3df4649

This rolls back to commit 661e7e46653e64d24212cc53486c72eff2eb678f.
Revert "Revert 661e7e4..3df4649"

This reverts commit 8fded9840832dd49970e37c1205611910b436ce5.
Revert "Merge pull request #155 from cid-harvard/rankings_api"

This reverts commit 3df4649b1b489b08330489d0abe233123713c9d6, reversing
changes made to 4677caaa3797a7652dc8956601b51c0b96ec753f.
Remove table top margin
Progress on scatterplot app
Hide hellbox when no static image
Updated Help and Legend boxes

— Added placeholder descriptions for diversification apps.
— Added pie chart to legend for product feasibility
Done #122 with sample file

Can be tested using a query string e.g.
/explore/tree_map/export/ner/show/all/2012/?show_related=true
Reverted scatterplot app to prev d3plus version

e.g. /explore/scatterplot/export/ukr/all/show/2011/