Add braintree backend
Add docs for braintree backend
Don't import unnecessary libs
Display error message from api
Submit transaction for settlement after verification
Merge branch 'master' into features/braintree

Conflicts:
	setup.py
Merge branch 'features/braintree-old' into features/braintree

Conflicts:
	setup.py
Add CreditCardPaymentFormWithName

Use it in paypal
Post more data to the braintree
Add versions to dependences
Drop unused call to `get_payment_model()`
Merge pull request #26 from mirumee/features/braintree

Add Braintree payment gateway