Bump Smartdown to v0.5.0 to get Snippets
Add snippets to simple Animal example flow
Import SPL snippets
Disable interpolation/calulations in SPL

Replace %{}, which does interpolation, with !{}, so they're not run, but
we can still regex them out easily.

- None of the calculations are implemented yet
- Some of the snippets reference answers they don't _seem_ to have been
  given while getting to that outcome
- Add an example outcome using snippets

These aren't implemented yet
simple birth/nothing outcome, with conditional

These could be distinct outcomes, but the copy/intent is so
similar i'd like to keep them conceptually grouped for now.

It's easier to work with fewer (though slightly more
complicated outcomes) and split them out later
Use human predicates from Smartdown for graph labels
With the exception of otherwise, which is missing the implementation until Smartdown is updated
Collapsed question title - use page title not question title
Changed previous responses parameters and url
Preselect questions for multiple choice questions
Fix previous response redirects in JavaScript
Correct date and salary question prefilling
Clean up JavaScript and add salary_question_presenter
Changed start again position and added question title to previous answers block
Fix all failing tests
Merge pull request #1130 from alphagov/snippets

Add snippet support and import SPL snippets
Merge pull request #1132 from alphagov/fix-spl-visualize

Fix Shared Parental Leave visualization
Fix previous answer link bug when there is only one answer
Add class to loading next step paragraph so we can scope styles to
that paragraph only to eliminate those styles breaking other p's

• add class .next-step

https://www.agileplannerapp.com/boards/105200/cards/5835
Add missing full stop
Publish marriage abroad august amends