Create UpdateRequest.php

send update request to the Stripe
Create UpdateFailure.txt
Create UpdateSuccess.txt
Update ResponseTest.php
Update GatewayTest.php
Update test response messages
Add supportUpdate request
Add stripe update request
Add example how to use Stripe update request
Add PayPal transactionId parameter. Closes #43 #44
Merge pull request #41 from pilot/master

Add support update request for Stripe gateway
added NetBanx Payment Gateway with unit tests
Merge pull request #46 from mrafalko/master

added NetBanx Payment Gateway with unit tests
Add MIGS gateway
CS fix
Update README.md