Disable retreat payment button until registration
Set stripe customer desc to email if fullname nil
Assoc stripe ID with payments

Also modify user#charge to return Stripe::Charge object
Def payment#refund
Merge pull request #47 from tmcyf/retreat-payment-prereq

Disable retreat payment button until registration
Merge pull request #48 from tmcyf/assoc-payment-stripe-id

Assoc payments with stripe id's
Merge pull request #49 from tmcyf/payment-refunds

Payment refunds
Merge branch 'master' into production
Fixed syntax error.
Merge branch 'master' into production