Changed
- Re-write of the package to enable ease of working with the returned NaPTAN data (data now returned as a pandas.DataFrame).
- `get_area_stops` now accepts a mix of numbers and strings
Added
- `export_geojson`: export the stop data and its attributes as geoJSON file.
- `create_map`: create a folium.Map object displaying the stops and some key attributes.
- `view_map`: create the folium.Map as above, and display it in the browser.
- `naptan.ATCO_CODES`: a package level variable to display the ATCO codes to area lookup table