update readme

Author: ip2location

README.md

@@ -1,6 +1,28 @@
 CodeIgniter IP2Location Library
 ===============================
 
+This module enables users to retrieve below geolocation information from an IP address. It supports both the IPv4 and IPv6 address.
+
+* Country
+* Region
+* City
+* Latitude & Longitude
+* ZIP Code
+* Time Zone
+* Area Code
+* Net Speed
+* ISP
+* Domain
+* Mobile Information
+* Weather Station Information
+* Elevation
+* Usage Type
+
+This module requires IP2Location BIN database to function. You may download the BIN database at the below link
+* IP2Location LITE BIN Database (free): http://lite.ip2location.com
+* IP2Location BIN Database (commercial version with high accuracy): http://www.ip2location.com
+  
+  
 Installation
 ------------
 Upload `controllers` and `libraries` to CondeIngniter `application` folder.
@@ -38,4 +60,4 @@ Methods
     $mnc = $this->ip2location_lib->getMNC($ip);
     $mobileCarrierName = $this->ip2location_lib->getMobileCarrierName($ip);
     $elevation = $this->ip2location_lib->getElevation($ip);
-    $usageType = $this->ip2location_lib->getUsageType($ip);
+    $usageType = $this->ip2location_lib->getUsageType($ip);