Adds Icon parameter to Weather

This adds the `icon` value of a weather result to the `Weather` struct

Author: Neverbolt

openweathermap.go

@@ -30,6 +30,7 @@ type Weather struct {
 	Id int `json:"id"`
 	Main string `json:"main"`
 	Description string `json:"description"`
+	Icon string `json:"icon"`
 }
 
 type Wind struct {