WorldBank-Transport/open-transit-indicators — pull request #131 by flibbertigibbet (2014-09-03 14:35:21+00:00)
Title: Feature/add d3 filter

These are changes to enable indicator queries for presentation in D3 charts:

* Add indicator endpoint filter for `sample_period` (filters already work for the other fields)
* Add endpoint to return list of distinct, non-null city names that have indicators loaded