Added support for passing an order_source to Litle authorize and purchase transactions.
   * See orderSource in the Litle XML Reference Guide section 4.151
Merge remote-tracking branch 'origin/master' into allow-custom-order-source-for-litle

# By Nathaniel Talbott (16) and others
# Via Nathaniel Talbott (5) and others
* origin/master: (74 commits)
  Update the CHANGELOG
  An attempt to fix failing tests on the Ci server caused by whitespace.
  Removed a comment that no longer applied.
  Add partial captures to wirecard gateway * Added add_amount function to add amount for capture and transaction * Changed authorize method to use the wirecard preauthorization api   * Partial captures don't work with 'authorize'   * Preauthorize allocates funds for the merchant * Changed capture_authorization action to just capture   * capture_authorization is an invalid function for partial captures * Added remote tests and unit tests   * Also changed the mocked response to reflect changes in api functions   used * Changed permitted_transactions to reflect changes
  Fix format() with string input error
  SagePay: Add support for GiftAidPayment
  Send currency to Authorize.net so that it can be used in both CA and UK.
  Fix broken remote tests.
  remove fractional amounts from TWD currency
  Stripe: Add support for application_fee.
  iDEAL: Add documentation for creating certificates
  NAB Transact: Add refund capability
  PayPal Express integration: Fix received_at tests
  PayPal Express integration: Fix received_at
  Moneris: Use a capture of $0 for void
  Coding style fixups.
  Fix syntax error for ruby < 1.9
  Use MerchantWare's v4 api for voiding transactions. Allows for voiding authorizations without first capturing them.
  Fix broken remote tests due to changes to the test servers on Merchant Ware's side.
  Add test for avs_results not being given back
  ...
Support ruby 1.8.7 hash syntax.
Merge pull request #2 from LessonPlanet/allow-custom-order-source-for-litle

Added support for passing an order_source to Litle authorize and purchase transactions