Group resources with sub-resources under one folder

[remi-stripe]

Some resources go together such as Account and LegalEntity or PayoutSchedule so we group all of them under a common folder.

At the same time, I renamed a few fields on some resources to match the API (but then stopped when I realized the diff would not really show that) and added support for AddressJapan on the Account resource.

r? @ob-stripe
cc @stripe/api-libraries

[remi-stripe]

One question I have is whether it'd be cleaner to have one folder per resource even if there's just one file? And if so, whether all shared/common resources are better under the resource they are closest to or under a Common folder like Address or Inventory.

[ob-stripe]

Rename Balances/ to Balance/ to be consistent with the Services/ tree / the API.

One question I have is whether it'd be cleaner to have one folder per resource even if there's just one file?

I'd have a slight preference for always having one folder per resource, though I don't feel too strongly about it.

And if so, whether all shared/common resources are better under the resource they are closest to or under a Common folder like Address or Inventory.

I'd be in favor of using a Common folder.

[remi-stripe]

@ob-stripe Done! PTAL

[ob-stripe]

Rename ThreeDSecures to ThreeDSecure. Otherwise LGTM!