user accounts

[davelandry]

• [x] sign up flow
• [x] login/logout
• [x] account page
• [x] Stripe integration/testing
• [x] e-mail confirmation
• [x] terms and conditions
• [x] privacy policy
• [x] password reset
• [x] password change
• [x] CMS user paywall example
• [x] customer service/support links