//Todo: mail to admin.  in paypal service
add missing paymentError
//Todo: send mail to admin  in stripeService
remove nonexisting mail TODO in LoanService
fix error
Fix loan admin feedback
add referred_by column
add referred_by in migration
Fix //TODO it's for reffered_by column in old DB
Merge pull request #315 from SingularityGuy/from-todos-to-done

From todos to done