Added 2.2 support
Merge pull request #55 from tristanbes/patch-1

Added 2.2 support
Merge branch 'master-jms'

# By Tristan Bessoussa
# Via Johannes (1) and Tristan Bessoussa (1)
* master-jms:
  Added 2.2 support
Added support for the following CHECKOUTSTATUS response from requestGetExpressCheckoutDetails:
CHECKOUTSTATUS = PaymentActionCompleted