add travis.
update docs.
fix BC breaks in tests. make them work on 5.3 again
fix BC breaks in tests. make them work on 5.3 again
update doctrine orm version.
Merge pull request #13 from Payum/update-docs

update docs.
Update README.md
add tests for mongo.
working base mongo tests config. still  have problem with hash fields.
use custom object type.
Merge branch 'mongo-tests' of git://github.com/Payum/PaypalExpressCheckoutNvp into mongo-tests