#75 added create geojson to features list in docs

+ extended supported file formats section description

Author: RandomFractals

README.md

@@ -17,6 +17,7 @@
 # Features
 
 - Map View 🗺️ for [GeoJSON](https://geojson.org/), [TopoJSON](https://github.com/topojson/topojson/wiki), [keplerg.gl JSON](https://github.com/keplergl/kepler.gl/blob/master/docs/user-guides/b-kepler-gl-workflow/a-add-data-to-the-map.md#supported-file-formats), [KML](https://developers.google.com/kml), [GPX](https://www.topografix.com/gpx.asp), [shapefiles](https://en.wikipedia.org/wiki/Shapefile), and CSV geo data files
+- Create `.geojson` file for `.topojson`, `.kml`, `.gpx`, `.shp` `.prj` and `.dbf` shapefiles
 - [Map Gallery](https://github.com/RandomFractals/geo-data-viewer#map-gallery) with public [kepler.gl](https://kepler.gl/) map configs to try
 - Save map 🗺️ in standalone html format to share with others via Slack or email :)
 - Save [kepler.gl JSON data and map config](https://github.com/RandomFractals/geo-data-viewer#supported-file-formats) for loading online via [kepler.gl demo app](https://kepler.gl/demo) or in this geo data tool
@@ -35,7 +36,7 @@
 
 # Supported File Formats
 
-See [kepler.gl file formats](https://github.com/keplergl/kepler.gl/blob/master/docs/user-guides/b-kepler-gl-workflow/a-add-data-to-the-map.md#supported-file-formats) documentation for the supported geo data files.
+See [kepler.gl file formats](https://github.com/keplergl/kepler.gl/blob/master/docs/user-guides/b-kepler-gl-workflow/a-add-data-to-the-map.md#supported-file-formats) documentation for the supported geo data files in addition to the geo data formats this extension provides for kepler.gl map 🗺️ views: [TopoJSON](https://github.com/topojson/topojson/wiki), [keplerg.gl JSON](https://github.com/keplergl/kepler.gl/blob/master/docs/user-guides/b-kepler-gl-workflow/a-add-data-to-the-map.md#supported-file-formats), [KML](https://developers.google.com/kml), [GPX](https://www.topografix.com/gpx.asp), [shapefiles](https://en.wikipedia.org/wiki/Shapefile)
 
 # Map Gallery