Address issue with duplicates trails - correct number is 3,846 trails and 24,413 reviews
Add latitude and longitude of trailheads (obtained via Google Maps; available for around 93% of trails)
Updated railtrails - increased data from 11,420 trails to 11,628 trails from 69,673 reviews to 72,512 reviews
Fixed n_reviews column to be an integer instead of a character
Tidy scraping and processing files
Add cc0 license
file to track changes to the package.