Provides automated methods for downloading, recoding, and merging
selected years of the Current Population Survey's Voting and Registration
Supplement < https://www.nber.org/research/data/current-population-survey-cps-supplements-voting-and-registration>,
a large N national survey about registration, voting, and non-voting in
United States federal elections. Provides documentation for appropriate use
of sample weights to generate statistical estimates, drawing from Hur &
Achen (2013)