updated ip handler interface, added default implementation

src/iphandler/DefaultIPHandler.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace ipinfo\ipinfolaravel\iphandler;
+
+/**
+ * Default implementation of the IPHandlerInterface. Selects default ip from request.
+ */
+class DefaultIPHandler implements IPHandlerInterface
+{
+
+    /**
+     * Selectes default IP address from request.
+     * @param \Illuminate\Http\Request $request
+     * @return string IP address.
+     */
+    public function getIP($request)
+    {
+        return $request->ip();
+    }
+}

src/iphandler/IPHandlerInterface.php

@@ -7,10 +7,11 @@
  */
 interface IPHandlerInterface
 {
-
-  /**
-   * Get IP address.
-   * @return string IP address.
-   */
-    public function getIP();
+
+    /**
+     * Get IP address.
+     * @param \Illuminate\Http\Request $request
+     * @return string IP address.
+     */
+    public function getIP($request);
 }