Shared themes should default to the code repository

[adamjohnson]

If a user has the shared masthead or footer being served from the code repository, hammer shouldn't have to be configured to point to the code repo via the mock_data.yml file. In other words, this:

shared_themes:
  layouts__masthead--v1: "code"
  layouts__footer__contact--v1: "code"
  layouts__footer__credits--v1: "code"
  layouts__footer__icons--v1: "code"
  layouts__browser-update-org--v1: "code"

...shouldn't be required. Hammer should assume these shared themes will be served from the code repo.

Now, let's say Eberly has a shared partial or something, once someone writes out shared_themes in the mock data file, that's when this stuff must be configured.

[zeroedin]

It is my opinion that the shared theme is not required by every theme. So I do not see this as something you are overriding, but adding in addition to your theme. You can shared a template from any "repo", and that does not by default to the "code" repo so hammer should also not default to "code".