Extract append query param to URLUtils
Merge pull request #723 from sharetribe/url-utils-append

Extract append query param to URLUtils
Update payments api documentation
Fix typo
Handle 10486

- Save redirect url to token
- Delete token only after successful authorize
- Add accessors to Token that take transaction_id instead of token
Add comma
Use merchant gem from PayPal repo
Merge pull request #722 from sharetribe/handle-10486-error

Handle 10486
Typo
added commission_from_seller column to transaction
copy 'current' commission_from_seller from community to transaction
hold_in_escrow fix. should not be a problem in production but helped in dev environment
refactoring: listing_conversation to listing_transaction
reduced the amount of globals in confirm.haml
initial calculate commission for seller
Redefine ref tx in and out params
Implement billing agreements / charge_commission
Extract with_success to a mixin
Automatic retries + fallback for charge_commission
added minimum commission to transaction