Adding maxcdn.GetLogs and maxtail tool.

Author: Josh Mervine

README.md

@@ -50,5 +50,12 @@ with `string` types.
 	if _, err = max.Delete("/zones/pull.json/123456", nil); err == nil {
 		fmt.Println("zone successfully deleted")
 	}
+
+    // Logs
+    if logs, err := max.GetLogs(nil); err == nil {
+        for _, line := range logs.Records {
+            fmt.Println("%+v\n", line)
+        }
+    }
 ```