Fixed big in reading latitude / longitude data.  Added visualizations of zipcode locations, top 1% of populated zipcodes, and top 1% of zipcodes by median household income.
Fixed big in reading latitude / longitude data.  Added visualizations of zipcode locations, top 1% of populated zipcodes, and top 1% of zipcodes by median household income.

rnowling/bigpetstore-data-generator,rnowling/bigpetstore-data-generator,rnowling/bigpetstore-data-generator