Make sure users can only edit their own resources

[victorb]

• websites/handle-index
• websites/handle-create
• websites/handle-show
• websites/handle-history
• websites/handle-update
• websites/handle-delete
• stripe/handle-create-session
• stripe/handle-create-portal-session
• domains/handle-index
• domains/handle-create
• domains/handle-update
• domains/handle-show
• domains/handle-delete
• domains/handle-verify
• domains/handle-validate
• websites/handle-zip-export