edited readme

Author: Petr Sramek

README.md

@@ -1,6 +1,9 @@
 # Polyline Algorithm for .NET (.NET Standard 2.1)
 
 Lightweight .NET Standard 2.1 library implementing Google Encoded Polyline Algorithm.
+It provides types and methods for encoding and decoding polylines.
+
+
 More info about the algorithm can be found at [Google Developers](https://developers.google.com/maps/documentation/utilities/polylinealgorithm).
 
 ## Prerequisites