Validate all APIs and update docs.

[fskreuz]

ractive.animate() map arguments no longer supported in 0.8 but this one got through without a deprecation warning and remained on the docs. Might be a good time to validate all APIs if they're all still valid and update the docs accordingly. This will be a huge effort testing each and every one, but one that needs to be done before 1.0 anyways.

_{This is a really good reason to merge docs into the lib repo like originally proposed. That way, any changes to the API will be accompanied with updates to the docs. But that's for another day. (Mkdocs is designed with that in mind btw 😉 . Notice how the docs is essentially just a docs dir, a mkdocs.yml, and nothing more? 🙂 ).}