WIP: rake script to process existing data
cache file for faster development
namespace the import util, decode urls
add `input_source` and `data_source` columns to WaterFountain
some usage notes in the rake task
in testing, exclude private attributes in comparison
handle idl bounding box in eastern hemisphere
Only get at most 50 fountains at a time.
extracted importer into class
Merge branch 'feature/import_existing_data'