Return a hash of plugin types from the plugin factory

Currently just build_type and render_type plugins
as they are the two different types required by
the new Flow API.
Fix for the animal-example-simple flow

Inconsistency between question_1 and question_4,
must have been broken in a merge.
Add Country Question presenter to smartdown adapter
Include a country question in the simple animal example.
Documentation for usage of Data Partials
Bump smartdown version, country questions now work.