[klarna] add klarna checkout payment factory.
[klarna] fix bugs, make it work
wip
wip
[klarna] configure merchant id, add doc
[klarna] add klarna checkout payment factory.
[klarna] fix bugs, make it work
wip
wip
[klarna] configure merchant id, add doc
[composer] set phpunit version explicitly
[composer] set phpunit version explicitly
Merge branch 'klarna-checkout' of git://github.com/Payum/PayumBundle into klarna-checkout
[klarna] add tests
Merge pull request #94 from Payum/klarna-checkout

[klarna] Add klarna checkout payment