Update README.md

README.md

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 GeoPHP is a open-source native PHP library for doing geometry operations. It is written entirely in PHP and 
 can therefore run on shared hosts. It can read and write a wide variety of formats: WKT (including EWKT), WKB (including EWKB), GeoJSON, 
-KML, GPX, GeoRSS. It works with all Simple-Feature geometries (Point, LineString, Polygon, GeometryCollection etc.)
+KML, GPX, and GeoRSS. It works with all Simple-Feature geometries (Point, LineString, Polygon, GeometryCollection etc.)
 and can be used to get centroids, bounding-boxes, area, and a wide variety of other useful information. 
 
 geoPHP also helpfully wraps the GEOS php extension so that applications can get a transparent performance