Fix double render error
Fix hash key
Refund actions and data types
Merge pull request #661 from sharetribe/paypal-refund-api

Paypal refund api
Merge pull request #659 from sharetribe/fix-doulbe-render

Fix double render error
separated function from paypal_webhook to different controllers
draft for paypal preauthorize process
quick fix: (marketplaceservice) transaction.preauthorization_expire_at doesn't work with paypal
create 'initiated' transition state but exclude it from conversation
Use transaction_id form DB
Remove transaction_id from return url
Fix payment tab
Shortened references for Services
Move preauth expiration logic to service
Void Paypal order if 3 days without response
Remove deprecated preauthorization_expire_at
Don't pass the model
Void paypal payment on reject
Use order date from previous API calls
Remove Paypal token after it has been used