Add state pending_ext
TransactionService
Fix tests, remove old code
Return updated transaction entity
Improvements to the service
Rename datatype creation methods
Merge pull request #675 from sharetribe/pending_ext

Paypal: Pending
Transaction entity
Move "entity" to datatypes
Instructions to create premier or business account

Changed PayPal instruction copys to point out that either a premier
account (for individuals) or a business account (for companies) is
needed to accept payments.
EntityUtils to_symbol transformer, use with care
Add billing agreement created spec
Make receipt id optional
Add paypal refunds
Paypal refunding service and ipn handling
Limit string db fields
Add validations for paypal refund
Merge pull request #680 from sharetribe/eutils-tosym

EntityUtils to_symbol transformer, use with care
Merge pull request #673 from sharetribe/ipn-refund-order

Ipn refund order
WTI pull