Summary:
Ref T2787. Phortune currently stores a bunch of stuff as `...inUSDCents`. This ends up being pretty cumbersome and I worry it will create a huge headache down the road (and possibly not that far off if we do Coinbase/Bitcoin soon). Even now, it's more of a pain than I figured it would be.
Instead:
- Provide an application-level serialization mechanism.
- Provide currency serialization.
- Store currency in an abstract way (currently, as "1.23 USD") that can handle currencies in the future.
- Change all `...inUSDCents` to `..asCurrency`.
- This generally simplifies all the application code.
- Also remove some columns which don't make sense or don't make sense anymore. Notably, `Product` is going to get more abstract and mostly be provided by applications.
Test Plan:
- Created a new product.
- Purchased a product.
- Backed an initiative.
- Ran unit tests.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T2787
Differential Revision: https://secure.phabricator.com/D10633
