Merge pull request #1075 from eileenmcnaughton/master

CRM/Core/Payment/BaseIPN.php

CRM/Core/Payment/PayPalIPN.php

CRM/Core/Payment/PayPalProIPN.php

CRM/Core/Payment/PaymentExpressIPN.php

api/v3/Contribution.php

api/v3/examples/Contribution/CreateWithNestedLineItems.php

api/v3/examples/ContributionGet.php

api/v3/utils.php

tests/phpunit/CiviTest/CiviUnitTestCase.php

tests/phpunit/api/v3/ContributionTest.php

...tensions/org.civicrm.payment.googlecheckout/GoogleIPN.php