Update parks.json

The new Google Drive Spreadsheet has adjusted formulas to convert the source data to CSV. Addresses for: 'city of sparks', 'washoe county', 'sun valley gid' parks have been added but lat, long, and park attributes must be collected. Total number of park names collected is 185. 105 Reno parks have all data and are included in this JSON string. Also note that Somerset coordinates have been corrected.