Update README.md

Author: w8r

README.md

@@ -1,4 +1,9 @@
-Greiner-Hormann polygon clipping algorithm
-==========================================
+Greiner-Hormann polygon clipping
+================================
+
+ * Does AND, OR, XOR (intersection, union, difference, if you're human)
+ * Plays nicely with [Leaflet](http://github.com/leaflet/leaflet/), comes with an adaptor for it
+ * Handles non-convex polygons and multiple clipping areas
+ * ~3kb compressed, no dependencies
 
 [Demo and documentation](http://w8r.github.io/GreinerHormann/)