Add session age and session id to README.md

Author: oalders

README.md

@@ -119,6 +119,8 @@ Checked exceptions:
 Transaction request = new Transaction.Builder(
         new Device.Builder(InetAddress.getByName("1.1.1.1"))
             .acceptLanguage("en-US")
+            .sessionAge(3600.6)
+            .sessionId("foobar")
             .userAgent("Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.90 Safari/537.36")
             .build()
     ).account(