Update README.md to contain rect and circle zone

Author: Jesse Emond

README.md

@@ -32,7 +32,13 @@ OpenWeather::Current.city_id("1273874")
 OpenWeather::Current.geocode(9.94, 76.26)
 
 # get current weather for a list of city ids
-OpenWeather::Current.cities([524901,703448,2643743])
+OpenWeather::Current.cities([524901, 703448, 2643743])
+
+# get current weather for a bounding box
+OpenWeather::Current.rectangle_zone(12, 32, 15, 37, 10)
+
+# get current weather for cities around a point
+OpenWeather::Current.circle_zone(55.5, 37.5, 10)
 
 # get the current weather in degrees celsius
 OpenWeather::Current.city("Cochin, IN", units: 'metric')