CRM-12679 - ensure IPN works when you use paypal express button

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* CRM-12679: Paypal Express Recurring IPN not working?
  http://issues.civicrm.org/jira/browse/CRM-12679
CRM-12679 - use properly FinancialType DAO call for 4.4

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* CRM-12679: Paypal Express Recurring IPN not working?
  http://issues.civicrm.org/jira/browse/CRM-12679
Merge pull request #3459 from jmcclelland/paypal-express-recur-master

Merging - this code has been in use for a long time!