Combine all full page views and embed

Push the embed logic into the embed template. Normally, I might be
opposed to such a thing, but it's minimal enough that it's more
pleasant to see all these views collapse into one function in the
views module.
Refactor dependencies at startup

Avoid explicit `config.commit()` calls by refactoring the way we load
horus and our own dependencies.

- Lift all horus overrides to be explicit in the h package include.
- Have h.views take care of more core imports to get the rendering
  system running. The idea is to make it easier for scripting and
  integrating only our views.
- Only use deform_bootstrap for template paths so it doesn't pollute the
  widget resource registry with the new load ordering.
Don't create default Consumer unless told to

At this point, all model creation that might happen during startup
is tied to the `basemodel.should_create_all` setting.
Remove unnecessary TODO note

I may not agree with this thought anymore.