Added weather route and embedded cache system

types/city.go

@@ -0,0 +1,9 @@
+package types
+
+// The City data type, representing the name, the latitude and the longitude
+// of a location
+type City struct {
+	Name string  `json:"name"`
+	Lat  float64 `json:"lat"`
+	Lon  float64 `json:"lon"`
+}