Braintree tests
Test server errors if unsuccessful transaction
Fixed minor email related error in user steps
Merge pull request #187 from sharetribe/braintree-tests

Braintree tests
Make payment filter handle better old payments, which didn't have community_id yet
Merge pull request #188 from sharetribe/comission-from-seller

Commission from seller
Merge branch 'develop' into payment-bugs
Merge pull request #191 from sharetribe/payment-bugs

Payment bugs fixed
Merge branch 'develop' into payment-refactoring