Update link. Add note for is_postal_in_city. (#14)

* Added note about isPostalInCity for USA addresses.

Author: PatrickCronin

README.md

@@ -3,7 +3,7 @@
 ## Description ##
 
 This package provides an API for the [MaxMind minFraud Score, Insights, and
-Factors web services](http://dev.maxmind.com/minfraud-score-and-insights-api-documentation).
+Factors web services](https://dev.maxmind.com/minfraud/).
 
 ## Installation ##
 

src/main/java/com/maxmind/minfraud/response/AbstractAddress.java

@@ -58,8 +58,8 @@ public final Integer getDistanceToIpLocation() {
     /**
      * @return This will return true if the postal code provided with the
      * address is in the city for the address. It will return false when the
-     * postal code is not in the city. If the address could not be parsed or
-     * was not provided, the null will be returned.
+     * postal code is not in the city. If the address was not provided,
+     * could not be parsed, or was not in USA, null will be returned.
      */
     @JsonProperty("is_postal_in_city")
     public final Boolean isPostalInCity() {