add NPR All Songs Considered poll makefile to examples

[derekeder]

We should add this, and possibly other makefiles by outside groups to our list of examples

repo: https://github.com/nprapps/allsongsconsidered-poll/
blog post: http://blog.apps.npr.org/2018/01/03/all-songs-considered-poll.html

[hancush]

We should add this from Eads, as well! https://github.com/propublica/ilcampaigncash