Payment/Manual: Add plugin stub
Payment/Manual: Add settings
Payment/Manual: Nicer plugin/method name
Payment/Manual: Show payment details
Payment/PayPal: Initial commit
Define blueprint and RH for notification
Payment/PayPal: Add invoice

to avoid multiple payments
PEP8
payment_paypal: Add default url
payment_paypal: Restrict event payment settings
payment_paypal: Use create_next for transactions
Use new transaction creation wrapper