R1:960ac3b2a6e1

Phortune v0

Summary:
Ref T2787. This does very little so far, but makes inroads on accounts and billing. This is mostly just modeled on what Stripe looks like. The objects are:

- **Account**: Has one or more authorized users, who can make manage the account. An example might be "Phacility", and the three of us would be able to manage it. A user may be associated with more than one account (e.g., a corporate account and a personal account) but the UI tries to simplify the common case of a single account.